The O2Ring fits most adult fingers with a circumference of 55.24 to 65.53 mm (about 2.17 to 2.568 inches). Its flexible ring design ensures comfort without pressure or numbness, even when worn overnight.
O2Ring™
Continuous Oxygen Monitor
Overnight Tracking Oxygen Levels and Pulse Rate
1M+
Consumers Benefit from the O2Ring
Snorers & Sleep Health
Pilots & Flyers
Outdoor Enthusiasts
Mental Workers
Seniors
O2Ring™ Continuous Oxygen Monitor
Overnight Tracking Oxygen Levels and Pulse Rate
🏆 1M+ Consumers Benefit
snorers
Pilots & Flyers
Mental Workers
Outdoor Enthusiasts
Seniors
Medical-Grade Accurate Pulse Oximeter
Track overnight, then view sleep oxygen report in the morning
Track Your Oxygen Level Every Second. Finger measurements work best for transmission oximeters, capturing stronger pulse signals and staying accurate across all skin tones. Paired with a smart SOC chip and anti-interference technology, the oximeter ring delivers reliable readings within ±2% accuracy.
Overnight Monitoring with Low Oxygen Alerts
Silent, smart, and partner-friendly. No loud beeping—just an adjustable vibration in case of low oxygen levels. It gently prompts you to change your sleeping position, like turning onto your side, to help open your airway and improve oxygen flow. Ring alerts you only when necessary, ensuring restful sleep without disturbing your partner.
Smart Tracking That Starts by Itself
- Automatic Start. Wear it and it powers on by itself to begin tracking your data.
- Built-in Memory. Stores up to 4 sets of 10-hour data, automatically syncing to your device via Bluetooth when connected to the app.
- Rechargeable Oximeter. 16 hours of battery life on a single charge.
Designed for Sleep. Not Slipping Off.
Wellue O2 Ring
Flexible fit, stays on
No limits, move freely
Feels like nothing
Traditional Duckbill Sensor
Sensor easily slips off during sleep
Restricts hand and finger movement
Often causes pressure and numbness
Free Features, No Subscription Required
Real-time Data
View real-time oxygen levels, pulse rate, and motion data in the free iOS & Android app. No delay, no guessing.
Detailed Reports to Share
View high-resolution charts updated every 4 seconds. Record unlimited data, annotate, and export for detailed insights.
Trend History Review
By reviewing weekly, monthly, and yearly trends, you can fine-tune your care and feel confident your sleep health is on the right track.
Quick Setup
Customize vibration, brightness, and reminder settings to match your sleep and health preferences.
Get Clear Insights
A summary of oxygen drops, low SpO duration, and your nightly Oxygen Score—data you can actually use to track your sleep health.
Export Reports
Download SpO2, pulse rate & motion reports in PDF / CSV formats—perfect for sharing with your doctor or keeping personal records.
Free Features, No Subscription Required
Quick Setup
Customize vibration, brightness, and reminder settings to match your sleep and health preferences.
High-Resolution Reports to Share
View high-resolution charts updated every 4 seconds. Record unlimited data, annotate, and export for detailed insights.
Trend History Review
By reviewing weekly, monthly, and yearly trends, you can fine-tune your care and feel confident your sleep health is on the right track.
Multi-User Management
Manage health information for up to 10 family members, add notes to each data set, all conveniently at your fingertips.
Make Sure Your CPAP Therapy Works
The O2Ring provides a real-time safety net by vibrating when your blood oxygen drops below a preset level.
Even with a good average of 96%, brief drops still appear and can indicate mask leaks, poor pressure, or positional problems.
Even with a good average of 96%, brief drops still appear and can indicate mask leaks, poor pressure, or positional problems.
Optimize Your Oxygen Therapy Over Time
Trends over days, weeks, or even years show whether your oxygen stays in the target range. You can share these insights with your doctor to help you keep adjusting toward better results.
Bundle & Save
BUY ONE GET ONE
50% OFF
Switch between rings for seamless 24-hour monitoring.
What Professionals Are Saying
"You can use this to show your doctor how you're sleeping at night. That's the real benefit of this. This could actually in theory save your life, because if you don't know if you're losing oxygen in the middle of the night, you may be totally unaware that you may have sleep apnea. And this type of product can alert you to consult your own physician and find out if you actually have a problem."
Dr. Adam J. Story, DC
"Another reason why the alarm is so useful is that some people who sleep on their back or get into really deep snoring, especially if you have sleep apnea can drop their oxygen levels low, and so you can set the ring to vibrate and wake you up to remind you to re-adjust your position in your sleep. You can re-adjust and then slip right back into sleep and hopefully not wake up your partner as well."
Cajun Koi Academy
What Our Customers Are Saying
After I reported my findings the sleep pulmonologist order an "official" oximetry test that showed the same result. I bought this to monitor my oxygen if I got COVID but when I got sick and thought it I had COVID it warned me and was the reason I went to the hospital.
Barbara Wren
A couple yrs after being diagnosed in 2015 for severe sleep apnea, and having to also get oxygen bled in my BiPap machine, I found this 02Ring and it has been my savior as I was wearing it all night but I was checking myself also during the day by wearing it different periods of time and I found out I needed oxygen also during the day.
As soon as I saw my specialist, I showed her some prints of some reports I printed of daytime use of my 02Ring and immediately they did the “6min walk” and a kind of breathing test and sure enough, I also needed oxygen during the day.
Ginette Mat
Wellue O2 ring is the best sleep aid ring one can get in the market. I suffer from COPD and my oxygen level runs critically low during my nightly sleep. I was on the look out for sleep aid to help me before my oxygen level drops critically low during my sleep. Only O2 ring offers setting the oxygen level threshold and the ring would silently buzz to wake you enough for you to change position and help your oxygen level recover. It’s amazing how better I am sleeping for past three years since using the O2 ring. It may look tiny but it’s a mighty device carrying 3 to 4 years of life with everyday use.
Basu A
Currently using this & it WORKS!
I failed CPAP & BiPAP. Using Alterna oral device and at 5 weeks this oximetry ring…It does not disrupt my sleep. Very user friendly! Got a report after first week of use from company.
Becky Dierks Reuss
We bought an O2 ring about 8 months ago and have used it frequently to monitor my wife's SO2 levels--day and night. Having the graphs showing results over time is very helpful. She has been prescribed oxygen at night but it's inconvenient often and we wanted to get data on how much SO2 levels drop. The ring provides perfect data for assessing this, as well as how she does when she exerts herself during exercise during the day. We've shared data with her pulmonologist and he's impressed.
Mark Secord
I think the Wellue ring is a bargain. I used mine at first to decide I needed to be tested for OSA. I was Severe. I continue to use it to monitor my CPAP use. A few nights ago the Wellue ring awakened me by vibrating because my O2 dropped below 90. A velcro strap on my mask had come loose. Thank you Wellue. I wear size 8 1/2 gloves, pretty big. The ring fits great. The free AP is OK, but I will continue to pay for the upgraded AP. If this ring breaks, I will buy another. I cannot say that about other rings that have broken.
Jim Joy
I love the ease of using this ring and being able to monitor my Oxygen level at night. I am doing Cadio-Pulmonary rehab and I like to see my levels during exercise.
Moveda Porath
Very happy with this ring even my pulmonologist says it’s a good thing.
Dean Brandt
I am a fitness and health enthusiast for which I was suggested by the doctors of Clinicspots before going on the trek to Kedarnath and while traveling to high altitude regions.
I would highly recommend this oximeter if you are traveling too because of its battery life and comfort. It can also be used by the elderly which can help you to track their blood oxygen levels, heart rate, and body movements. Wonderful Initiative by Wellue especially for people like me.
Pankaj Srivastava
I'm a pilot and wanted to get an oximeter to replace my aging finger clip-style oximeter. A couple of features I really like are the vibrating alarm, which I set to high when flying to alert me before hypoxia sets in. And then also - no more batteries to replace. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly what I need it to.
Ron G.
I sleep on my back because of other medical issues and I snore… the app report for each use is very informative, detailed, and visually well done. The graphs are very easy to expand and view even for short time periods. The pdf reports are also well done, easy to make notations on, and a wonderful record of my O2 status each night and over time.
The ring is very comfortable to wear. I wear it on my index finger and haven't had any issues with it catching on the sheets or any other problems.
Barb
Which Ring Tracks Oxygen Best?
See Why Wellue O2Ring Is the Top Choice for Sleep Health & Oxygen Therapy Users
Wellue O2Ring
VS
Other Metal ring
Real-time continuous
Monitoring Type
Sleep-only, spot checks
Transmissive – medical-grade
Technology & Accuracy
Reflective – general wellness only
Every second
Sampling Frequency
Intermittent( several minutes)
Low Oxygen Alerts
Screen for real-time SpO2, HR
On-Ring Display
No screen
Specifications
- PHYSICAL DETAILS
- SPO2 & PR PARAMETER
- WHAT'S IN THE BOX
Model
O2Ring
Fits Finger Circumference
55.24 mm – 65.53 mm (2.17" – 2.58")
Weight
0.53 oz / 15g
Device Dimensions
1.5'' x 1.2'' x 1.5''
Degree of Dust & Water Resistance
IP22
Battery Life
Rechargeable lithium-polymer, 3.7 Vdc; 16 hours for typical use
Charge Time
2-3 hours
Wireless
Bluetooth 4.0 BLE
Built-In Memory
4 sessions, up to 10 hours for each session
Recorded Parameters
Oxygen level, pulse rate, motion
Oxygen Level Range
70%-100%
Pulse Rate Range
30 to 250 bpm
SpO2 Accuracy
80%-99%: ±2% 70%-79%: ±3%
Pulse Rate Accuracy
±2bpm or ±2%
Measure Interval
1S
Data Display Interval in App
4S
Compatible Computer System
Windows 7/8/10/11;
macOS 10.15.3 or later
Works With
iOS 9.0 or later, iPhone 4s/iPad 3 or later;
Android 5.0 or later, with Bluetooth 4.0 BLE
What's Included
Wellue® O2Ring™ Continuous Ring Oxygen Monitor
Micro USB cable
User guide
A charging cable is included with the O2Ring. This is for replacement or backup use.
Frequently Asked Questions
What finger sizes does the O2Ring fit?
Which finger should I wear the O2Ring on?
Choose a finger that offers a snug, comfortable fit—neither too tight nor too loose. Since finger size and shape vary, try different fingers to find the most secure placement for accurate SpO2 and heart rate tracking.
Will it fall off during sleep?
The flexible, medical-grade silicone ring is designed to fit snugly and stay securely in place, even during overnight use.
Can I use the O2Ring if I have a pacemaker?
Yes, you can use the O2Ring with a pacemaker. However, pacemaker signals may interfere slightly with heart rate waveform readings. Use the data as a reference and consult your doctor for medical interpretation.
Is the O2Ring suitable for elderly users?
Absolutely. The device is easy to wear, automatically starts tracking when put on, and syncs data with a simple app interface, no technical knowledge required.
Does it work without an internet connection?
Yes. The O2Ring does not require Wi-Fi or mobile data to function. It stores data locally and syncs via Bluetooth when connected to the app.
Reviews, Q&A
Customer Reviews
Based on 1051 reviews
79%
(832)
15%
(158)
5%
(48)
1%
(7)
1%
(6)
R
I'm a pilot and wanted to get an oximeter to replace my aging finger clip style oximeter. A couple features I really like are the vibrating alarm, which I set to high when flying to alert me to before hypoxia sets in. And then also - no more batteries to replace. My old unit required a CR2 battery, but this unit lasts longer than I can fly in a day, and then some. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly I need it too. Compared to my old unit, my O2 readings are identical, so either they're both off or both accurate, but the readings seem reasonable and consistent and the heart rate sensor matches my Polaris HR belt, so that checks.
I have used it for sleeping out of curiosity as well and it was comfortable on my ring finger through the night. it was a tight fit on my index finger (I have an XL sized hand), although I noted that it provides the same read out on my thumb, index and ring fingers.
S
Very interesting results after 1 week of use. Night 1 pic on left shows problems that worried me. So I took some corrective action in the first 6 days (better meal at dinner, not eating after 7pm, nose spray, better hydrated, changed pillows, etc), took advantage of the ring feature to buzz me when my SPO2 dropped low, monitored every night, and last night's results are on the right. It's a noticeable improvement, and more importantly, I feel much better. I'm data-driven generally, so this device is great for me.
D
The computer program needs to have a header that can be used by labratories to put their info , company name and phone and address.
it also lakes the ability to type in different patients info. know it only allows on patient ..
If you wont this product to be used in clinics and labs you must make these changes.
I have tried to reach out via e mail but have not had any resposes.
I would buy 10 for my lab if these simple issues where corrected
Regards
Daniel baker RCP, CRTT
B
Just received the O2Ring and wore it for the first time last night. Was very pleased and impressed with the cellphone app report (attached). It captured in expandable detail my O2 level throughout the night and the vibration alarm woke me several times at the low O2 level I set. Just recently learned of my sleep apnea, which I've probably had for over 30 years and I'm hoping to use the O2Ring to help determine the affect of various therapeutics I plan to try on at home. I've started using the CPAP but I don't like it and am hoping to find an alternative solution. Good-luck with your efforts.
A
Overall quite useful. Here is my wish list of improvements.
1. Needs linux version of software or ability to output data in say .csv format for archiving/studying data.
2. Ring could be more comfortable to wear all night. Perhaps a wrist band version might be more comfortable?
3. The is a missed opportunity to have a morning wake up alarm, given the device already has a clock and vibration capability.
4. A minor thing but going to bed after 12am, then the following night going to bed before 12am shows up as the same night.
5. More space in the text box for notes especially because of point 1.
6. An even dimmer display setting.
7. A dimmer red light if possible.
8. A progress bar or percent charged indicator for charging.
All this sounds a lot but I really liked the device and it shows great potential. Once my studies with it are complete I probably won't wear it again but I definitely do not regret buying.
l
Having tested positive for covid 19 this ring has given me peace of mind .
I monitor my oxygen levels throughout the day as this is very important for knowing when a hospital visit is needed.
T
Very useful device. I appreciate the vibrating alarm that you can set to alert you to a chosen level of oxygen saturation.
As a doctor myself I am keen to use this on patients who might have as sleep apnea.
P
I've had the O2Ring for 1 week. One thing is for sure: Without this product on my finger, I would not have the data that may help me deal with apnea. It's clear I'm having events where my O2 drops quickly. On days following such nights I'm not well-rested and sometimes I have a particular kind of headache I never have except after waking from such a sleep. The first night I wore it the record was quite good. Great, I thought. Then for the next 5 nights my levels became worse and worse, and yes the ring woke me several times, and apparently brought me out of a deep and breathless sleep a few times. Then for the past two nights, I've slept long and well and I woke feeling refreshed. Each night I've changed my pillow arrangement and tried slightly different versions of side-sleeping, (the only way I sleep). So maybe I'm on to something, something I can do to improve my sleep.
I'm a designer of electronic products, so I know what has to go into this device. It's totally state of the art, wonderfully comfortable and amazingly miniaturized. The app works great, even on my old iPhone 5. This is a real accomplishment. Great work! Now please, develop a cpap machine that won't destroy the possibility of romance!
A
I can see what is going on as I sleep. I can print out copy for doctors, and for me it helped me not take a higher milligram of meds, because my heart rate was too low in my sleep. Thank GOD I had this.
P
My O2 ring arrived yesterday. It was so easy to set up; so easy to use.
The app is so high tech and has so much information.
Lifesaving. One of my most important pieces of Jewelry.
Free Shipping
We offer free shipping for O2Ring internationally. For countries and regions we can deliver to, the referenced transit time is 2-8 business days.
You can track your order status anytime here https://getwellue.com/pages/track-order. Please feel free to contact us if you have any questions or concerns.
30-Day Money Back Guarantee
At any time within 30 days of receiving your order, you are not 100% satisfied, you may return it to us for a refund.
If you bought the product from www.getwellue.com, you can return it to us. Your payment card will be credited upon receipt of the returned merchandise. Any items damaged due to reasons not covered under warranty cannot be accepted back for refund under our 30 Day Money Back Guarantee.
If you are sure you want to return the goods, please contact us at first at support@getwellue.com. We provide 24/7 ticket and email support. Please contact us if you need assistance.
Compare with the Similar Products
Wearable Type
Ring
Wrist-worn
Wrist-worn
Reminder on Device or app
SpO2, Heart Rate
SpO2, Heart Rate
SpO2
Notification Method on Device
Vibration
Vibration, Beep
Vibration
Battery Life
Up to 16 Hours
Up to 72 Hours
Up to 16 Hours
Data Display Interval in App
4 seconds
2 seconds
4 seconds
You May Also Like
Track Your Oxygen Level Every Second
Wearing the ring, it will automatically start tracking your overnight blood oxygen saturation, pulse rate and body movement continuously.
Who Can Benefit from O2Ring
Snorer
Aged People
Sleep
Brain Workers
Aviation
Outdoor Sports
Overnight Tracking
Track the Trends of Your Overnight Oxygen Levels & Pulse Rate
Free iOS/Android APP
Save History Data to Your Phone Unlimitedly for Free
Seamless Share Report
Share PDF/CSV Analysis & Trend Chart
Silent Vibrator
Adjustable Vibration for Abnormal Body Index
Built-in Memory
Work Independently or syncs with the app
Rechargeable
Rechargeable Battery Lasts 16 Hours
Overnight Tracking
Track the Trends of Your Overnight Oxygen Levels & Heart Rate
Free iOS/Android APP
Save History Data to Your Phone Unlimitedly for Free
Seamless Share Sleep Report
Share PDF/CSV Analysis & Trend Chart
Silent Vibrator
Adjustable Vibration for Abnormal Body Index
Built-in Memory
Work Independently or syncs with the APP
Rechargeable
Rechargeable Battery Lasts 16 Hours at 1 charge
bUY ONE GET ONE 50% OFF
Get 24-hour continuous monitoring.
gREAT bUNDLE dEALS
Buy O2Ring & O2 Concentrator Together to Save Big!
Detailed Analysis and Trends
Intuitive Report Reveals Wellness Insights
Our app provides users with detailed analysis and records of overnight blood oxygen levels, pulse rates, and body movements. It records in 4-second intervals.
Export Your Data
Export detailed reports in PNG (picture) or CSV, easily share or print via free Windows PC/Mac App.
Customize Your Vibration
You can turn off the prompt function or adjust the intensity of vibration separately for the oxygen level and pulse rate. You can also set your own threshold on the smartphone.
Free & lightweight, providing maximum comfort.
O2 ring only weighs 15 grams, free your finger like wearing nothing. Nonslip. No numbness.
Traditional
Duckbill Sensor
Sensor goes off easily
Limited finger movement
Finger gets numb
Wellue O2 Ring
Stay fixed on finger
Completely free your hand
Like wearing nothing
See How Easy it is
1
Wear the ring
Wear it at the office or in bed, it works automatically.
2
Take it off
Your recordings are ready while you take it off.
3
Sync data
Upload data to the app, share it with your doctor.
Free APP for iOS & Android
Integration with Apple Health
Specifications
- PHYSICAL DETAILS
- SPO2 & PR PARAMETER
- WHAT'S IN THE BOX
MODEL
O2Ring
RING PERIMETER
2.0'' - 3.2''/ 50-82mm
WEIGHT
0.53 oz / 15g
DEVICE DIMENSIONS
1.5'' x 1.2'' x 1.5''
DEGREE OF DUST & WATER RESISTANCE
IP24
BATTERY LIFE
Rechargeable lithium-polymer, 3.7 Vdc; 12-16 hours for typical use
CHARGE TIME
2-3 hours
WIRELESS
Bluetooth 4.0 BLE
BUILT-IN MEMORY
4 sessions, up to 10 hours for each session
RECORDED PARAMETERS
Oxygen levels, pulse rate, motion
OXYGEN LEVEL RANGE
70%-99%
PULSE RATE RANGE
30 to 250 bpm
SPO2 ACCURACY
80%-99%: ±2% 70%-79%: ±3%
PULSE RATE ACCURACY
±2bpm or ±2%
MEASURE INTERVAL
1S
DISPLAY INTERVAL IN APP DATA CHART
4S
COMPATIBLE COMPUTER SYSTEM
Windows 7/8/10;
macOS 10.15.3 or above
COMPATIBLE WITH
iOS 9.0 or above, iPhone 4s/iPad 3 or above; Android 5.0 or above, with Bluetooth 4.0 BLE
What's Included
Wellue® O2Ring™ Continuous Ring Oxygen Monitor
Micro USB cable
User guide
What Professionals Are Saying
Dr. Adam J. Story, DC
"You can use this to show your doctor how you're sleeping at night. That's the real benefit of this. This could actually in theory save your life, because if you don't know if you're losing oxygen in the middle of the night, you may be totally unaware that you may have sleep apnea. And this type of product can alert you to consult your own physician and find out if you actually have a problem."
Review on Mar.27.2022
Cajun Koi Academy
"Another reason why the alarm is so useful is that some people who sleep on their back or get into really deep snoring, especially if you have sleep apnea can drop their oxygen levels low, and so you can set the ring to vibrate and wake you up to remind you to re-adjust your position in your sleep. You can re-adjust and then slip right back into sleep and hopefully not wake up your partner as well. "
Review on Jan.4.2020
What Our Customers Are Saying
Steven Griff
Highly recommended
"After spending 3 weeks in the hospital with Covid, after release and home on O2 ring has proven to be a great asset sleeping at night the downloaded graph in the morning provides me with a wealth of information. Now it will wake me when or if my oxygen level drops below a preset warning."
Pankaj Srivastava
The One Gadget that you need today
"I am Pankaj Srivastava, a fitness and health enthusiast for which I was suggested by the doctors of Clinicspots before going on the trek to Kedarnath and while traveling to high altitude regions; to use O2ring wearable pulse oximeter by Wellue for keeping track of my blood oxygen levels, through the monitor in my device which was portable everywhere, and the ring which is very comfortable to wear even at my office and during my exercise. It has helped me not only in tracking my levels but also help me storing the data on my devices and also helped me to know when my oxygen levels have fallen or are high. I would highly recommend this oximeter if you are traveling too because of its battery life and comfort. It can also be used by the elderly which can help you to track their blood oxygen levels, heart rate, and body movements. Wonderful Initiative by Wellue especially for people like me."
Ron G.
Exactly what I wanted
"I'm a pilot and wanted to get an oximeter to replace my aging finger clip-style oximeter. A couple of features I really like are the vibrating alarm, which I set to high when flying to alert me before hypoxia sets in. And then also - no more batteries to replace. My old unit required a CR2 battery, but this unit lasts longer than I can fly in a day, and then some. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly what I need it to. Compared to my old unit, my O2 readings are identical, so either they're both off or both accurate, but the readings seem reasonable and consistent and the heart rate sensor matches my Polaris HR belt, so that checks..."
Benjie
So happy to have bought one
"As part of my COVID-19 recovery, I need to monitor my O2 & PR as much as possible. O2Ring gave me that option plus some. The Reports were a big plus to my needs. As well as the alarm feature. I just wished it could be used in the shower and also use it while charging so I could gather a complete 24hrs stat of my system. I recommend this product for post-Covid patients still having O2 stability concerns and for Sleep Apnea patients to learn more about their illness."
Kenechi Munonyedi
A very handy and informative gadget, very useful
"Post- COVID and in the recovery phase, I needed to keep an eye on Oxygen Saturation levels and Heart Rate. That's where the O2 ring comes in. It's very useful to know how these levels change with different tasks and the mobile and desktop apps provide a lot of information and trends. Customer Service has been responsive and helpful. I would highly recommend it."
Barb
Amazing device, better than expected!
"I sleep on my back because of other medical issues and I snore, so my results weren't quite as good as I'd hoped but they are improving. The app report for each use is very informative, detailed, and visually well done. The graphs are very easy to expand and view even for short time periods. The pdf reports are also well done, easy to make notations on, and a wonderful record of my O2 status each night and over time.
The ring is very comfortable to wear. I wear it on my index finger and haven't had any issues with it catching on the sheets or any other problems.
The O2Ring was a little more than I was initially looking for, but I am very happy that I bought it because it provides a lot more information about my health status when sleeping. All pros and no cons after nearly a month of nightly use."
Mark Secord
Great product--and the company stands behind it.
"We bought an O2 ring about 8 months ago and have used it frequently to monitor my wife's SO2 levels--day and night. Having the graphs showing results over time is very helpful. She has been prescribed oxygen at night but it's inconvenient often and we wanted to get data on how much SO2 levels drop. The ring provides perfect data for assessing this, as well as how she does when she exerts herself during exercise during the day. We've shared data with her pulmonologist and he's impressed.
Several weeks ago the display on the device went dark. Wellue responded to my email inquiry promptly and had me do some interventions. When these failed to work they sent me a new O2 ring. Minimal hassle.
I don't give 5-star ratings easily but this one was easy."
Frequently Asked Questions
What is O2 Score?
O2 Score is a measure of oxygen shortage during whole sleep. It combines frequency, duration, and depth of oxygen drops. A higher score means oxygen is richer. If it's yellow or red, please ask your doctor for advice.
Do I need to pair Bluetooth?
DO NOT PAIR in the system settings of your phone. Make sure the Bluetooth is enabled on your phone and device’s battery is not out.
Why do I need to allow Location access for Android?
With android phone, you need to allow Location access to make Bluetooth work. We DO NOT collect your location data.If you have refused the permission, you can try following steps to allow the access:
1)Reboot your phone;
2)Turn on “location”on your phone;
3)System settings -> Apps-> ViHealth, allow location access.
Why I can’t connect device with App after updating iOS system software?
If you can’t connect your device after updating iOS, please try the following steps:
1)In the system settings, turn off and turn on Bluetooth;
2)In the Control Center, tap the Bluetooth icon repeatedly to re-enable Bluetooth.
Turn on device, run App to connect it.
How to sync data?
Take off the device. After the countdown, the data will be ready for sync.
1)After the countdown, open App to sync data.
2)Or next time after you turn on your device, open App to sync.
If measurement time is less than 2 minute, there will be no data.
O2ring Usage Guide
How to set up O2Ring App
More FAQs
Reviews, Q&A
Customer Reviews
Based on 1051 reviews
79%
(832)
15%
(158)
5%
(48)
1%
(7)
1%
(6)
R
I'm a pilot and wanted to get an oximeter to replace my aging finger clip style oximeter. A couple features I really like are the vibrating alarm, which I set to high when flying to alert me to before hypoxia sets in. And then also - no more batteries to replace. My old unit required a CR2 battery, but this unit lasts longer than I can fly in a day, and then some. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly I need it too. Compared to my old unit, my O2 readings are identical, so either they're both off or both accurate, but the readings seem reasonable and consistent and the heart rate sensor matches my Polaris HR belt, so that checks.
I have used it for sleeping out of curiosity as well and it was comfortable on my ring finger through the night. it was a tight fit on my index finger (I have an XL sized hand), although I noted that it provides the same read out on my thumb, index and ring fingers.
S
Very interesting results after 1 week of use. Night 1 pic on left shows problems that worried me. So I took some corrective action in the first 6 days (better meal at dinner, not eating after 7pm, nose spray, better hydrated, changed pillows, etc), took advantage of the ring feature to buzz me when my SPO2 dropped low, monitored every night, and last night's results are on the right. It's a noticeable improvement, and more importantly, I feel much better. I'm data-driven generally, so this device is great for me.
D
The computer program needs to have a header that can be used by labratories to put their info , company name and phone and address.
it also lakes the ability to type in different patients info. know it only allows on patient ..
If you wont this product to be used in clinics and labs you must make these changes.
I have tried to reach out via e mail but have not had any resposes.
I would buy 10 for my lab if these simple issues where corrected
Regards
Daniel baker RCP, CRTT
B
Just received the O2Ring and wore it for the first time last night. Was very pleased and impressed with the cellphone app report (attached). It captured in expandable detail my O2 level throughout the night and the vibration alarm woke me several times at the low O2 level I set. Just recently learned of my sleep apnea, which I've probably had for over 30 years and I'm hoping to use the O2Ring to help determine the affect of various therapeutics I plan to try on at home. I've started using the CPAP but I don't like it and am hoping to find an alternative solution. Good-luck with your efforts.
A
Overall quite useful. Here is my wish list of improvements.
1. Needs linux version of software or ability to output data in say .csv format for archiving/studying data.
2. Ring could be more comfortable to wear all night. Perhaps a wrist band version might be more comfortable?
3. The is a missed opportunity to have a morning wake up alarm, given the device already has a clock and vibration capability.
4. A minor thing but going to bed after 12am, then the following night going to bed before 12am shows up as the same night.
5. More space in the text box for notes especially because of point 1.
6. An even dimmer display setting.
7. A dimmer red light if possible.
8. A progress bar or percent charged indicator for charging.
All this sounds a lot but I really liked the device and it shows great potential. Once my studies with it are complete I probably won't wear it again but I definitely do not regret buying.
l
Having tested positive for covid 19 this ring has given me peace of mind .
I monitor my oxygen levels throughout the day as this is very important for knowing when a hospital visit is needed.
T
Very useful device. I appreciate the vibrating alarm that you can set to alert you to a chosen level of oxygen saturation.
As a doctor myself I am keen to use this on patients who might have as sleep apnea.
P
I've had the O2Ring for 1 week. One thing is for sure: Without this product on my finger, I would not have the data that may help me deal with apnea. It's clear I'm having events where my O2 drops quickly. On days following such nights I'm not well-rested and sometimes I have a particular kind of headache I never have except after waking from such a sleep. The first night I wore it the record was quite good. Great, I thought. Then for the next 5 nights my levels became worse and worse, and yes the ring woke me several times, and apparently brought me out of a deep and breathless sleep a few times. Then for the past two nights, I've slept long and well and I woke feeling refreshed. Each night I've changed my pillow arrangement and tried slightly different versions of side-sleeping, (the only way I sleep). So maybe I'm on to something, something I can do to improve my sleep.
I'm a designer of electronic products, so I know what has to go into this device. It's totally state of the art, wonderfully comfortable and amazingly miniaturized. The app works great, even on my old iPhone 5. This is a real accomplishment. Great work! Now please, develop a cpap machine that won't destroy the possibility of romance!
A
I can see what is going on as I sleep. I can print out copy for doctors, and for me it helped me not take a higher milligram of meds, because my heart rate was too low in my sleep. Thank GOD I had this.
P
My O2 ring arrived yesterday. It was so easy to set up; so easy to use.
The app is so high tech and has so much information.
Lifesaving. One of my most important pieces of Jewelry.
What's in the Box？
Wellue® O2Ring™ Continuous Ring Oxygen Monitor
Micro USB cable
User guide
* Smart phone and laptop not included
pulse oximeter
Shipping
We offer free shipping for O2Ring internationally. For countries and regions we can deliver to, the referenced transit time is 2-8 business days.
You can track your order status anytime here: https://getwellue.com/apps/tracktor/track. Please feel free to contact us if you have any questions or concerns.
30-Day Money Back Guarantee
At any time within 30 days of receiving your order, you are not 100% satisfied, you may return it to us for a refund.If you bought the product from www.getwellue.com, you can return it to us.
Your payment card will be credited upon receipt of the returned merchandise. Any items damaged due to reasons not covered under warranty cannot be accepted back for refund under our 30 Day Money Back Guarantee.
If you are sure you want to return the goods, please contact us at first at support@getwellue.com. We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance.
Tech Specs
WEIGHT
0.53 oz / 15g
DEVICE DIMENSIONS
1.5'' x 1.2'' x 1.5''
RING PERIMETER
2.0'' - 3.2''/ 50-82mm
WIRELESS
Bluetooth 4.0 BLE
BATTERY LIFE
Rechargeable lithium-polymer, 3.7 Vdc; 12-16 hours for typical use
VIBRATION SOURCE
Low oxygen levels, high/low pulse rate
DEGREE OF DUST &WATER RESISTANCE
IP24
RECORDED PARAMETERS
Oxygen levels, pulse rate, motion
COMPATIBLE COMPUTER SYSTEM
Windows 7/8/10;
macOS 10.15.3 or above
WORKS WITH
iOS 9.0 or above, iPhone 4s/iPad 3 or above; Android 5.0 or above, with Bluetooth 4.0 BLE
OXYGEN LEVEL RANGE
70%-99%
PULSE RATE RANGE
30 to 250 bpm
MEASURE INTERVAL
1S
DISPLAY INTERVAL IN APP DATA CHART
4S
BUILT-IN MEMORY
4 sessions, up to 10 hours for each session
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V-shaped
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Flat
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No
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Microphone
Built-in mic
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Built-in mic
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25 hours
30 hours
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Water-resistant
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No
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Up to 16 Hours
Up to 72 Hours
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Yes
Yes
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<90% Time,Drops over>4%,Drops per Hour, Avg. Lowest SpO2,HR,O2 Score
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<90% Time,Drops over>4%,Drops per Hour, Avg. Lowest SpO2,HR,O2 Score
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Medical-Grade Accurate Pulse Oximeter
Track overnight, then view sleep oxygen report in the morning
Track Your Oxygen Level Every Second. Finger measurements work best for transmission oximeters, capturing stronger pulse signals and staying accurate across all skin tones. The ring delivers reliable readings within ±2% accuracy.
Overnight Monitoring with Low Oxygen Alerts
Silent, smart, and partner-friendly. No loud beeping-just an adjustable vibration in case of low oxygen levels. It gently prompts you to adjust your sleeping position to open your airway, alerting only when needed to ensure restful sleep without disturbing your partner.
Smart Tracking That Starts by Itself
Automatic Start
Wear it and it powers on by itself to begin tracking your data. Take it off to stop.
Built-in Memory
Stores up to 4 sets of 10-hour data. Automatically syncs when connected to app.
Rechargeable
Runs for up to 16 hours on a full 2.5-hour charge.
Flexible Fit
Patented flexible component fits different finger sizes.
Designed for Sleep. Not Slipping Off.
Wellue O2 Ring
✔ Flexible fit, stays on
✔ Free to move
✔ Feels like nothing
Old-Style Duckbill Sensor
✘ Sensor easily slips off
✘ Limits finger motion
✘ Often causes numbness
Free Features, No Subscription Required
Real-time Data
View real-time oxygen levels, pulse rate, and motion data in the free iOS & Android app. No delay, no guessing.
Quick Setup
Customize vibration, brightness, and reminder settings to match your sleep and health preferences.
High-Resolution Reports to Share
View high-resolution charts updated every 4 seconds. Record unlimited data, annotate, and export for detailed insights.
Trend History Review
By reviewing weekly, monthly, and yearly trends, you can fine-tune your care and feel confident your sleep health is on the right track.
Get Clear Insights
A summary of oxygen drops, low SpO duration, and your nightly Oxygen Score—data you can actually use to track your sleep health.
Export Reports
Download SpO2, pulse rate & motion reports in PDF / CSV formats—perfect for sharing with your doctor or keeping personal records.
Make Sure Your CPAP Therapy Works
The O2Ring provides a real-time safety net by vibrating when your blood oxygen drops below a preset level.
Even with a good average of 96%, brief drops still appear and can indicate mask leaks, poor pressure, or positional problems.
Optimize Your Oxygen Therapy Over Time
Trends over days, weeks, or even years show whether your oxygen stays in the target range. You can share these insights with your doctor to help you keep adjusting toward better results.
Bundle & Save
BUY ONE GET ONE 50% OFF
Switch between rings for seamless 24-hour monitoring
What Professionals Are Saying
What Our Customers Are Saying
After I reported my findings the sleep pulmonologist order an "official" oximetry test that showed the same result. I bought this to monitor my oxygen if I got COVID but when I got sick and thought it I had COVID it warned me and was the reason I went to the hospital.
Barbara Wren
A couple yrs after being diagnosed in 2015 for severe sleep apnea, and having to also get oxygen bled in my BiPap machine, I found this 02Ring and it has been my savior as I was wearing it all night but I was checking myself also during the day by wearing it different periods of time and I found out I needed oxygen also during the day.
As soon as I saw my specialist, I showed her some prints of some reports I printed of daytime use of my 02Ring and immediately they did the “6min walk” and a kind of breathing test and sure enough, I also needed oxygen during the day.
Ginette Mat
Wellue O2 ring is the best sleep aid ring one can get in the market. I suffer from COPD and my oxygen level runs critically low during my nightly sleep. I was on the look out for sleep aid to help me before my oxygen level drops critically low during my sleep. Only O2 ring offers setting the oxygen level threshold and the ring would silently buzz to wake you enough for you to change position and help your oxygen level recover.
It’s amazing how better I am sleeping for past three years since using the O2 ring. It may look tiny but it’s a mighty device carrying 3 to 4 years of life with everyday use.
Basu A
Currently using this & it WORKS!
I failed CPAP & BiPAP. Using Alterna oral device and at 5 weeks this oximetry ring…It does not disrupt my sleep. Very user friendly! Got a report after first week of use from company.
Becky Dierks Reuss
We bought an O2 ring about 8 months ago and have used it frequently to monitor my wife's SO2 levels--day and night. Having the graphs showing results over time is very helpful. She has been prescribed oxygen at night but it's inconvenient often and we wanted to get data on how much SO2 levels drop. The ring provides perfect data for assessing this, as well as how she does when she exerts herself during exercise during the day. We've shared data with her pulmonologist and he's impressed.
Mark Secord
I think the Wellue ring is a bargain. I used mine at first to decide I needed to be tested for OSA. I was Severe. I continue to use it to monitor my CPAP use. A few nights ago the Wellue ring awakened me by vibrating because my O2 dropped below 90. A velcro strap on my mask had come loose. Thank you Wellue. I wear size 8 1/2 gloves, pretty big. The ring fits great. The free AP is OK, but I will continue to pay for the upgraded AP. If this ring breaks, I will buy another. I cannot say that about other rings that have broken.
Jim Joy
I love the ease of using this ring and being able to monitor my Oxygen level at night. I am doing Cadio-Pulmonary rehab and I like to see my levels during exercise.
Moveda Porath
Very happy with this ring even my pulmonologist says it’s a good thing.
Dean Brandt
I am a fitness and health enthusiast for which I was suggested by the doctors of Clinicspots before going on the trek to Kedarnath and while traveling to high altitude regions.
I would highly recommend this oximeter if you are traveling too because of its battery life and comfort. It can also be used by the elderly which can help you to track their blood oxygen levels, heart rate, and body movements. Wonderful Initiative by Wellue especially for people like me.
Pankaj Srivastava
I'm a pilot and wanted to get an oximeter to replace my aging finger clip-style oximeter. A couple of features I really like are the vibrating alarm, which I set to high when flying to alert me before hypoxia sets in. And then also - no more batteries to replace. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly what I need it to.
Ron G.
I sleep on my back because of other medical issues and I snore… the app report for each use is very informative, detailed, and visually well done. The graphs are very easy to expand and view even for short time periods. The pdf reports are also well done, easy to make notations on, and a wonderful record of my O2 status each night and over time.
The ring is very comfortable to wear. I wear it on my index finger and haven't had any issues with it catching on the sheets or any other problems.
Barb
Which Ring Tracks Oxygen Best?
See Why Wellue O2Ring Is the Top Choice for Sleep Health & Oxygen Therapy Users
Wellue O2Ring
VS
Other Metal ring
Real-time continuous
Monitoring Type
Sleep-only, spot checks
Transmissive – medical-grade
Technology & Accuracy
Reflective – general wellness only
Every second
Sampling Frequency
Intermittent
( several minutes)
Low Oxygen Alerts
Screen for real-time SpO2, HR
On-Ring Display
No screen
Tech Specs
Model
O2Ring
Fits Finger Circumference
55.24 mm – 65.53 mm (2.17" – 2.58")
Weight
0.53 oz / 15g
Device Dimensions
1.5'' x 1.2'' x 1.5''
Degree of Dust & Water Resistance
IP22
Battery Life
Rechargeable lithium-polymer, 3.7 Vdc; 16 hours for typical use
Charge Time
2-3 hours
Wireless
Bluetooth 4.0 BLE
Built-In Memory
4 sessions, up to 10 hours for each session
Recorded Parameters
Oxygen level, pulse rate, motion
Oxygen Level Range
70%-100%
Pulse Rate Accuracy
±2bpm or ±2%
Pulse Rate Range
30 to 250 bpm
Oxygen Level Accuracy
±2bpm or ±2%, whichever is greater
Sampling Interval
1 second
Data Display Interval in App
4 seconds
Compatible Computer System
Windows 7/8/10/11;
macOS 10.15.3 or later
Works With
iOS: Version 9.0 or later, iPhone 4s/iPad 3 or later;
Android: Version 5.0 or later, with Bluetooth 4.0 BLE
Frequently Asked Questions
What finger sizes does the O2Ring fit?
The O2Ring fits most adult fingers with a circumference of 55.24 to 65.53 mm (about 2.17 to 2.568 inches). Its flexible ring design ensures comfort without pressure or numbness, even when worn overnight.
Which finger should I wear the O2Ring on?
Choose a finger that offers a snug, comfortable fit—neither too tight nor too loose. Since finger size and shape vary, try different fingers to find the most secure placement for accurate SpO2 and heart rate tracking.
Do I need to keep the app open while wearing it?
No. The O2Ring has built-in storage. You can wear it independently, then sync the data with the app afterward.
Is the O2Ring suitable for elderly users?
Absolutely. The device is easy to wear, automatically starts tracking when put on, and syncs data with a simple app interface, no technical knowledge required.
Does it work without an internet connection?
Yes. The device does not require Wi-Fi or mobile data to function. It stores data locally and syncs via Bluetooth when connected to the app.
Reviews, Q&A
Customer Reviews
Based on 1051 reviews
79%
(832)
15%
(158)
5%
(48)
1%
(7)
1%
(6)
R
I'm a pilot and wanted to get an oximeter to replace my aging finger clip style oximeter. A couple features I really like are the vibrating alarm, which I set to high when flying to alert me to before hypoxia sets in. And then also - no more batteries to replace. My old unit required a CR2 battery, but this unit lasts longer than I can fly in a day, and then some. I noted that it tracks my oxygen well as I climb to altitude in my unpressurized airplane and had a little fun experimenting with adjusting my oxygen bottle feed at 12,500' MSL from 90% to 98% blood O2 level.
It appears to be very good quality and does exactly I need it too. Compared to my old unit, my O2 readings are identical, so either they're both off or both accurate, but the readings seem reasonable and consistent and the heart rate sensor matches my Polaris HR belt, so that checks.
I have used it for sleeping out of curiosity as well and it was comfortable on my ring finger through the night. it was a tight fit on my index finger (I have an XL sized hand), although I noted that it provides the same read out on my thumb, index and ring fingers.
S
Very interesting results after 1 week of use. Night 1 pic on left shows problems that worried me. So I took some corrective action in the first 6 days (better meal at dinner, not eating after 7pm, nose spray, better hydrated, changed pillows, etc), took advantage of the ring feature to buzz me when my SPO2 dropped low, monitored every night, and last night's results are on the right. It's a noticeable improvement, and more importantly, I feel much better. I'm data-driven generally, so this device is great for me.
D
The computer program needs to have a header that can be used by labratories to put their info , company name and phone and address.
it also lakes the ability to type in different patients info. know it only allows on patient ..
If you wont this product to be used in clinics and labs you must make these changes.
I have tried to reach out via e mail but have not had any resposes.
I would buy 10 for my lab if these simple issues where corrected
Regards
Daniel baker RCP, CRTT
B
Just received the O2Ring and wore it for the first time last night. Was very pleased and impressed with the cellphone app report (attached). It captured in expandable detail my O2 level throughout the night and the vibration alarm woke me several times at the low O2 level I set. Just recently learned of my sleep apnea, which I've probably had for over 30 years and I'm hoping to use the O2Ring to help determine the affect of various therapeutics I plan to try on at home. I've started using the CPAP but I don't like it and am hoping to find an alternative solution. Good-luck with your efforts.
A
Overall quite useful. Here is my wish list of improvements.
1. Needs linux version of software or ability to output data in say .csv format for archiving/studying data.
2. Ring could be more comfortable to wear all night. Perhaps a wrist band version might be more comfortable?
3. The is a missed opportunity to have a morning wake up alarm, given the device already has a clock and vibration capability.
4. A minor thing but going to bed after 12am, then the following night going to bed before 12am shows up as the same night.
5. More space in the text box for notes especially because of point 1.
6. An even dimmer display setting.
7. A dimmer red light if possible.
8. A progress bar or percent charged indicator for charging.
All this sounds a lot but I really liked the device and it shows great potential. Once my studies with it are complete I probably won't wear it again but I definitely do not regret buying.
l
Having tested positive for covid 19 this ring has given me peace of mind .
I monitor my oxygen levels throughout the day as this is very important for knowing when a hospital visit is needed.
T
Very useful device. I appreciate the vibrating alarm that you can set to alert you to a chosen level of oxygen saturation.
As a doctor myself I am keen to use this on patients who might have as sleep apnea.
P
I've had the O2Ring for 1 week. One thing is for sure: Without this product on my finger, I would not have the data that may help me deal with apnea. It's clear I'm having events where my O2 drops quickly. On days following such nights I'm not well-rested and sometimes I have a particular kind of headache I never have except after waking from such a sleep. The first night I wore it the record was quite good. Great, I thought. Then for the next 5 nights my levels became worse and worse, and yes the ring woke me several times, and apparently brought me out of a deep and breathless sleep a few times. Then for the past two nights, I've slept long and well and I woke feeling refreshed. Each night I've changed my pillow arrangement and tried slightly different versions of side-sleeping, (the only way I sleep). So maybe I'm on to something, something I can do to improve my sleep.
I'm a designer of electronic products, so I know what has to go into this device. It's totally state of the art, wonderfully comfortable and amazingly miniaturized. The app works great, even on my old iPhone 5. This is a real accomplishment. Great work! Now please, develop a cpap machine that won't destroy the possibility of romance!
A
I can see what is going on as I sleep. I can print out copy for doctors, and for me it helped me not take a higher milligram of meds, because my heart rate was too low in my sleep. Thank GOD I had this.
P
My O2 ring arrived yesterday. It was so easy to set up; so easy to use.
The app is so high tech and has so much information.
Lifesaving. One of my most important pieces of Jewelry.
Free Shipping
We offer free shipping for for O2Ring internationally. For countries and regions we can deliver to, the referenced transit time is 2-8 business days.
You can track your order status anytime here https://getwellue.com/pages/track-order. Please feel free to contact us if you have any questions or concerns.
30-Day Money Back Guarantee
At any time within 30 days of receiving your order, you are not 100% satisfied, you may return it to us for a refund.
If you bought the product from www.getwellue.com, you can return it to us. Your payment card will be credited upon receipt of the returned merchandise. Any items damaged due to reasons not covered under warranty cannot be accepted back for refund under our 30 Day Money Back Guarantee.
If you are sure you want to return the goods, please contact us at first at support@getwellue.com. We provide 24/7 ticket and email support. Please contact us if you need assistance.
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