The O2RingS fits most adult fingers with a circumference of 55.24 to 80 mm (about 2.17 to 3.15 inches). Its flexible ring design ensures comfort without pressure or numbness, even when worn overnight.
O2Ring-S
Smart Ring Pulse Oximeter
High-Precision Continuous Oxygen Monitoring with Instant Alerts
☑ Next-Gen 1s tracking of SpO2, pulse, and body movement.
☑ Vibration alerts for low blood oxygen or abnormal pulse rate.
☑ Wake up to easy-to-read reports you can trust, share, or bring to your doctor.
O2Ring-S Smart Ring Pulse Oximeter
High-Precision Continuous Oxygen Monitoring with Instant Alerts
Next-Gen 1s tracking of SpO2, pulse, and body movement
Vibration alerts for low blood oxygen, abnormal pulse rate
Wake up to detailed, easy-to-read reports you trust and share.
Unmatched Accuracy.
Uninterrupted Sleep Confidence.
Smart O2RingS takes overnight oxygen tracking to
a whole new level
— not just in tech, but in how it feels to use.
Unmatched Accuracy. Uninterrupted Sleep Confidence.
Smart O2RingS takes overnight oxygen tracking to a whole new level
— not just in tech, but in how it feels to use.
Next-Gen Trusted Sleep Monitoring
If you loved the original O2Ring, you’ll love the more powerful O2RingS.
We made upgrades in accuracy, ease of use, and more stable readings — all while keeping what made O2Ring so popular.
Data Readings
Improved signal filtering, more stable and accurate readings
Accurate readings, standard filtering
Storage Interval
1s
4s
Continuous Tracking Duration
Up to 24 hours
Up to 16 hours
Charging Port
Type-C
Micro USB
Ultra-stable and alerts only when it truly matters
With an upgraded chip and a larger battery, O2Ring-S runs our next-gen algorithm at full capacity, processing more real signal data, more often.
It delivers ultra-stable, accuracy, even as you change position in your sleep — with smart alerts that trigger only when something truly needs your attention.
Enjoy deeper, safer sleep.
Every Detail Counts. Every Second Shows It.
Now every second tells a clearer story, thanks to upgraded sampling rate and storage capacity. O2Ring-S records more data points with greater precision, capturing subtle shifts in your oxygen and pulse rate that other devices might miss.
A full, second-by-second view of your sleep health.
Whether you’re reviewing your report or sharing it with your doctor, every second is accounted for — literally.
Next-Gen Trusted Sleep Monitoring
If you loved the original O2Ring, you’ll love the more powerful O2RingS.
We made upgrades in accuracy, ease of use, and more stable readings — all while keeping what made O2Ring so popular.
Data Readings
Improved signal filtering, more stable readings
Accurate readings, standard filtering
Storage Interval
1s
4s
Continuous Tracking Duration
Up to 24 hours
Up to 16 hours
Charging Port
Type-C
Micro USB
Ultra-Stable, Accurate Readings
Enjoy deeper, safer sleep
Next-Gen Algorithm
With an upgraded chip and a larger battery, O2Ring-S runs our next-gen algorithm at full capacity, processing more real signal data, more often.
It delivers ultra-stable, accuracy, even as you change position in your sleep — with smart alerts that trigger only when something truly needs your attention.
Gentle Vibration Alarm
Support for Troubled Breathing
Customize Vibration
If your oxygen level falls below the safe range you sett, the O2RingS will vibrate on your finger.
Many users liken it to a caring nudge, encouraging you to change your position or check CPAP without the panic of a loud alarm.
Every Detail Counts
Every Second Shows It
Stable 1-Second Readings
With upgraded sampling rate and storage capacity, O2Ring-S records more data points with greater precision, capturing subtle shifts in your oxygen and heart rate that other devices might miss.
Whether you’re reviewing your report or sharing it with your doctor, every second is accounted for — literally.
Beyond Numbers,
It Turns Sleep Data Into Insightful Analysis
The sleep analysis will highlight periods of low oxygen, calculate overnight SpO2 averages, and may even help you notice potential apnea events by correlating oxygen drops with your movement or pulse changes.
Beyond Numbers,
It Turns Sleep Data Into Insightful Analysis
The sleep analysis will highlight periods of low oxygen, calculate overnight SpO2 averages, and may even help you notice potential apnea events by correlating oxygen drops with your movement or pulse changes.
This level of detail can help you understand
Real-time Monitoring
if your therapy is truly effective
For example, if your oxygen level stays nice and steady all night, your CPAP is doing its job.
If you see recurring drops below, say, 91%, it might be time to adjust your mask or pressure.
Research-Grade Data
For those who love to dive deep, O2RingS delivers precise data with its 200Hz sampling rate — offering research-grade information at home. Some users even use it to run personal health experiments or contribute to sleep studies.
Real-time Monitoring
This level of detail can help you understand
if your therapy is truly effective
For example, if your oxygen level stays nice and steady all night, your CPAP is doing its job.
If you see recurring drops below, say, 91%, it might be time to adjust your mask or pressure.
Research-Grade Data
For those who love to dive deep, O2Ring-S delivers precise data with its 200Hz sampling rate — offering research-grade information at home. Some users even use it to run personal health experiments or contribute to sleep studies.
Gentle Vibration Alert with Custom Settings
Your Silent Nighttime Guardian — For Anyone Who’s Ever Woken Gasping or Worried About Their Breathing.
If your oxygen level falls below the safe range you set (or if your heart rate strays beyond your set limits),
the O2RingS will vibrate on your finger.
Many users liken it to a caring nudge, encouraging you to change your sleeping position or check your CPAP without the panic of a loud alert. In effect, it acts as a safety net for CPAP failures or apnea events by prompting you to resume normal breathing.
One Ring, Any Finger
The patented flexible ring fits finger sizes (55 mm – 80 mm / 2.17" – 3.15") and stays put—no slipping, no pinching.
Use It Anytime, Anywhere
Beyond sleeping, you can wear it during meditation, or at work—for spot checks or all-day tracking.
Feather-Light
Ready to go: just 17 grams, no cables, and so comfortable you’ll forget it’s there day or night.
Upgraded Battery Life
3 Nights of Power
Upgraded with a high-capacity battery, the new O2Ring-S delivers 50% longer runtime — from 2 nights to 3 full nights on a single charge.
Only needs charging once every 3 days.
Now with a universal USB-C port, power it up from your laptop, power bank, or any common cable for greater flexibility and convenience.
Works Straight Out of the Box
Built-in memory and stand-alone: O2Ring-S stores up to 4 sessions of 10-hour data.
Just wear it, let it work through the night, and your data automatically uploads to our free mobile app (iOS/Android) or PC software when you connect the next day.
From the very first night, you get accurate, complete reports — no complicated setup, no constant Bluetooth required.
Real Stories, Real Impact
Jim Joy
"I didn’t think my wife’s CPAP was working properly. I asked her to wear the Wellue pulse oxygen ring I had bought to spot check my CPAP. A half hour after lights out I woke up with her slapping her hand. I asked what’s wrong? She said this ring thing keeps buzzing. I told her BREATH! It has spiked down to 85% oxygen. I ordered a new auto pressure CPAP (APAP) and used the oxygen sensor ring to dial in the minimum and maximum pressure to keep her above 92%. That included going to a full nose and mouth mask. Data is better than hoping."
Becky Dierks Reuss
"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."
Melody Cheeseman Diehl
"I love my ring! Being on oxygen 24/7 after COVID I depend on my ring to wake me when I lose my cannula while sleeping. I also wear at times (like outside gardening) just to check I that I am not overdoing and still at a good level. Best thing I have found"
Carol Jurca
"It’s a real investment in my health. I didn’t know my oxygen levels were getting so low, down to 80%! I would have never known this unless I was being monitored. For me, it’s money well spent."
Lise MacLeod
"This works really well. It puts a detailed record on your phone that you can study and share. It can be set to ring or vibrate to alert you when your oxygen level is low, so you can take some deep breaths."
Martha Hudson
"I love mine. When O2 drops into the 80%, the ring buzzes me to wake up to breath and 02 goes right back up."
Lyle Shakespear
"The ring stays on and is fairly comfortable. It records data essentially non-stop all night and provides a nice report showing my numbers throughout the night. I'm able to see oxygen levels for the whole night as well as a count of the number of oxygen level drops I had."
Victor Wardle
"Works very well. It does link in with their app easily which can then be exported to other applications.
Fits nicely and not an encumberance."
Specifications
- PHYSICAL DETAILS
- SPO2 & PR PARAMETER
- WHAT'S IN THE BOX
Fits Finger Circumference
55 mm – 80 mm (2.17" – 3.15")
Weight
0.6 oz / 17g
Device Dimensions
38mm x 30mm x 38mm (1.5'' x 1.2'' x 1.5'')
Degree of Dust & Water Resistance
IP22
Battery Life
Rechargeable lithium-polymer, 3.7 Vdc; 24 hours for typical use
Charge Time
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
1S
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
Wellue® O2Ring™ S Smart Ring Pulse Oximeter
Type-C cable
User guide
Frequently Asked Questions
What finger sizes does the O2RingS fit?
Which finger should I wear the O2RingS 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.
What’s the difference between O2Ring and O2RingS?
O2RingS is the upgraded version with:
→ More stable & accurate readings (200Hz sampling + next-gen algorithm)
→ Longer battery life: 24 hours of continuous tracking
→ USB-C charging: more convenient
→ Higher-resolution data: 1-second interval recordings
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.
Does O2RingS require a subscription to access O2 scores or other features?
No, O2RingS doesn’t require a subscription. All core features — including real-time oxygen tracking, detailed reports, O2 scores, trend graphs, and data export — are completely free to use.
Does it work without an internet connection?
Yes. The O2RingS 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
Free Shipping
We offer free shipping for O2RingS 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.
You May Also Like
O2Ring-S Smart Ring Pulse Oximeter
High-Precision Continuous Oxygen Monitoring with Instant Alerts
Next-Gen 1s tracking of SpO2, pulse, and body movement
Vibration alerts for low blood oxygen, abnormal pulse rate
Wake up to detailed, easy-to-read reports you trust and share.
Unmatched Accuracy.
Uninterrupted Sleep Confidence.
Smart O2RingS takes overnight oxygen tracking to
a whole new level
— not just in tech, but in how it feels to use.
What’s the difference
between O2Ring and O2RingS?
Next-Gen Trusted Sleep Monitoring
Data Readings
Accurate readings, standard filtering
Storage Interval
4s
Continuous Tracking
Up to 16 hours
Charging Port
Micro USB
Improved signal filtering, more stable and accurate readings
1s
Up to 24 hours
Type-C
Ultra-Stable, Accurate Readings
Enjoy deeper, safer sleep
Next-Gen Algorithm
With an upgraded chip and a larger battery, O2Ring-S runs our next-gen algorithm at full capacity, processing more real signal data, more often.
It delivers ultra-stable, accuracy, even as you change position in your sleep — with smart alerts that trigger only when something truly needs your attention.
Gentle Vibration Alert
Support for Troubled Breathing
Customize Vibration
If your oxygen level falls below the safe range you sett, the O2Ring-S will vibrate on your finger.
Many users liken it to a caring nudge, encouraging you to change your position or check CPAP without the panic of a loud alert.
Every Detail Counts
Every Second Shows It
Stable 1-Second Readings
With upgraded sampling rate and storage capacity, O2Ring-S records more data points with greater precision, capturing subtle shifts in your oxygen and pulse rate that other devices might miss.
Whether you’re reviewing your report or sharing it with your doctor, every second is accounted for — literally.
Beyond Numbers,
It Turns Sleep Data Into Insightful Analysis
The sleep analysis will highlight periods of low oxygen, calculate overnight SpO2 averages, and may even help you notice potential apnea events by correlating oxygen drops with your movement or pulse changes.
This level of detail can help you understand
if your therapy is truly effective
For example,
if your oxygen level stays nice and steady all night,
your CPAP is doing its job.
If you see recurring drops below, say, 91%,
it might be time to adjust your mask or pressure.
For those who love to dive deep,
O2RingS delivers high-fidelity data with its 200Hz sampling rate, offering research-grade information at home.
Some users even use it to run personal health experiments or contribute to sleep studies.
Upgraded Battery Life
3 Nights of Power
Upgraded with a high-capacity battery, the new O2Ring-S delivers 50% longer runtime — from 2 nights to 3 full nights on a single charge. Only needs charging once every 3 days.
Now with a universal USB-C port, power it up from your laptop, power bank, or any common cable for greater flexibility and convenience.
Works Straight Out of the Box
No Constant Bluetooth Required
Built-in memory and stand-alone: O2Ring-S stores up to 4 sessions of 10-hour data.
Just wear it, let it work through the night, and your data automatically uploads to our free mobile app (iOS/Android) or PC software when you connect the next day.
Real Stories, Real Impact
Jim Joy
"I didn’t think my wife’s CPAP was working properly. I asked her to wear the Wellue pulse oxygen ring I had bought to spot check my CPAP. A half hour after lights out I woke up with her slapping her hand. I asked what’s wrong? She said this ring thing keeps buzzing. I told her BREATH! It has spiked down to 85% oxygen. I ordered a new auto pressure CPAP (APAP) and used the oxygen sensor ring to dial in the minimum and maximum pressure to keep her above 92%. That included going to a full nose and mouth mask. Data is better than hoping."
Becky Dierks Reuss
"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."
Melody Cheeseman Diehl
"I love my ring! Being on oxygen 24/7 after COVID I depend on my ring to wake me when I lose my cannula while sleeping. I also wear at times (like outside gardening) just to check I that I am not overdoing and still at a good level. Best thing I have found"
Carol Jurca
"I just got mine about 5 days ago and it’s a real investment in my health. I didn’t know my oxygen levels were getting so low, down to 80%! I would have never known this unless I was being monitored. For me, it’s money well spent."
Lise MacLeod
"This works really well. It puts a detailed record on your phone that you can study and share. It can be set to ring or vibrate to alert you when your oxygen level is low, so you can take some deep breaths."
Martha Hudson
"I love mine. When O2 drops into the 80%, the ring buzzes me to wake up to breath and 02 goes right back up."
Lyle Shakespear
"The ring stays on and is fairly comfortable. It records data essentially non-stop all night and provides a nice report showing my numbers throughout the night. I'm able to see oxygen levels for the whole night as well as a count of the number of oxygen level drops I had."
Victor Wardle
"Works very well. It does link in with their app easily which can then be exported to other applications.
Fits nicely and not an encumberance."
Tech Specs
Fits Finger Circumference
55 mm – 80 mm (2.17" – 3.15")
Weight
0.6 oz / 17g
Device Dimensions
38mm x 30mm x 38mm (1.5'' x 1.2'' x 1.5'')
Degree of Dust & Water Resistance
IP22
Battery Life
Rechargeable lithium-polymer, 3.7 Vdc; 24 hours for typical use
Charge Time
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
1 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 O2RingS fit?
The O2RingS fits most adult fingers with a circumference of 55.24 to 80 mm (about 2.17 to 3.15 inches). Its flexible ring design ensures comfort without pressure or numbness, even when worn overnight.
Which finger should I wear the O2RingS on?
For the most accurate readings, wear the O2RingS on your thumb or index finger. These fingers offer a secure fit and stronger blood flow, helping ensure reliable SpO2 and heart rate data. If the fit is too tight or too loose, other fingers may be used as alternatives.
What’s the difference between O2Ring and O2RingS?
O2RingS is the upgraded version with:
→ More stable & accurate readings (200Hz sampling + next-gen algorithm)
→ Longer battery life: 24 hours of continuous tracking
→ USB-C charging: more convenient
→ Higher-resolution data: 1-second interval recordings
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.
Does O2RingS require a subscription to access O2 scores or other features?
No, O2RingS doesn’t require a subscription. All core features — including real-time oxygen tracking, detailed reports, O2 scores, trend graphs, and data export — are completely free to use.
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
Free Shipping
We offer free shipping for for O2RingS 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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