Wellue O2Ring Wearable Pulse Oximter, SPO2 Blood Oxygen Saturation Monitor - Bluetooth O2 Meter Ring Sensor with Vibration Reminder, Free APP & PC Report, Rechargeable

I was recently diagnosed with Atrial Fibrillation (Afib). This works great for tracking my condition while sleeping. I was worried that it wouldn't fit, since it looked big in the product pictures, and I have skinny fingers/thumbs. It fits nice though. Not too big or small, and it's comfortable. I was also worried because some reviews said that it was not accurate, but mine seems to be really accurate. The heart rate matches my Garmin 405CX (w/chest strap) and my Emay portable ECG. The oxygen levels match the small pulse oximeter I have within 1%-2%.It's super easy to use. Just put it on your thumb and it turns on and starts recording. So far I can use it all night, sometimes 9 hours or so, and it still has a little under half battery left. If you have it on over 10 hours it will start a new recording as each one is limited to 10 hours, but it does it automatically so you don't loose any data. The screen goes off after about 30 seconds and you can turn it on (for another 30 seconds) by tapping the round circle on the screen. This lets me easily check if I wake up in the middle of the night.I especially like the graphs that their software produces. The oxygen level and heart rate are vertically lined up so it's easy to see what each was doing at a particular time. I wish the lines/bars on the "movement/activity" graph were a little larger so you could see movement better, but they are good enough. One graph shows all night on a single line with blocks of 1 hour (up to 10 hours) so you get a big picture view. Then it's broken into another graph that spans over 4 pages or so and are in 1-minute blocks displayed at 4-second intervals. For me, I can easily see when I go into and out of Afib. The device uploads data to PC quickly and I especially like that I can convert an entire graph/report to PDF with one click. This makes it super easy to keep permanent records. With my PDF program I can have two windows (with different nights) showing to compare.I also have Sleep Apnea, so this allows me to monitor my oxygen levels, something I've wanted to do for a while. This lets me know that my CPAP is working.

It works well and does exactly what it is supposed to do. It only holds 4 days of data though which is a little annoying. The data must be downloaded onto an app which is quite basic and has such small icons to show the scores, that it is virtually unable to be seen. So, I'm happy with the o2 ring, but find the app too basic.

I bought this to monitor my O2 overnight because I have breathing issues.I like the product and the information it has provided has been VERY helpful to me and my peace of mind. The product seems well built and has worked perfectly. The documentation does not explain the readings very well, but I found a bunch of information online that explained in detail all of the parts of this piece of equipment and what the information means. However, there are some tricks to getting the most reliable readings.Finger position. Before you use this over night, take a few minutes to test the finger position of the device. Put it on a finger and turn on the App, and go to the Dashboard. This will show you O2 and heart rate, PLUS the strength of the O2 pulse signal (green bar graph on the right). I found that putting the device on different fingers, and on different parts of each finger, made a HUGE difference in consistent readings. The device, which uses a rubber band type attachment around the finger, can be uncomfortable on larger fingers and for extended periods of time. The device works best on the meaty part of the finger and I got the best signal on my left index finger. So, play with it. Put it on, give it a minute to catch up, and see which finger gets you the most green on the graph. YOU MUST HAVE A FIRM FIT AND GOOD PI TO GET CONSISTENT RELIABLE READINGS.This is important because if the device is too loose on your finger, your graph in the morning will be all over the place. Too loose and it slips around and does not get enough signal. Move off the meaty part of the finger, for comfort, and you get poor signal. This can give you extremely unreliable information. Once I found my right spot, and left it there, and got used to the device over night, my results were consistent and reliable.This has helped me find the best sleeping position to get the best O2 overnight. It has also alleviate my fears of sleep apnea. Its been well worth the purchase and I recommend the product!

While I’m not tech savvy (over 60) this amazing device is easy to wear while sleeping and easy to view information on both iPad and PC. Gives a great view of sleep pattern and able to set vibration alert for instances of oxygen desaturation. I’m still learning about the information provided but so far really impressed. Husband has large hands so can only wear on little finger but seems fine. Hoping it has longevity. I think it would be useful to monitor the effectiveness of CPAP therapy at home too. In my home it’s providing great reassurance about O2 saturation during sleep. Very pleased with this device. Would recommend.

Works well compared to my other pulse ox, it appears to be accurate. 4stars because I wish the battery lasted longer before needing charged ( max two nights).