Very easy to use, can test the temperature of adults and kids temperature. Works straight out the box. Not only gives temperature reading but has a color-coded display to confirm if within an acceptable level, above or below. Very pleased with the purchase. Checked against other ear thermometers. Very light.
The bluetooth version syncs all your measurements right into the app "ViHealth" on your iphone. There are settings for adults, children and just a plain object, like a warm glass of water for example. You can measure all those. If you slip off the front 'cone' the thermometer automatically goes into ear measurement mode. No complicated switching. Also, you can mute the sound if you are measuring an infant and don't want to wake them. The display is color coded green, red, orange so you can easily see if your temp is off. Two AAA batteries and you're good to go.