Wellue Pulse Oximeter Fingertip Blood Oxygen Saturation Heart Rate Monitor with Batteries and Lanyard Bluetooth FS20F White

Works great. Simple to use and linked with the app on my phone with no issues.

I haven't used the app yet, but overall, the actual device itself works great for me. I love how quickly it turns off so it doesn't waste battery and has been pretty accurate for me.

Its simple and very easy to use. You will have to download another app, but other than that its pretty much very nice.

it does exactly what it says, it uses a 3rd party app and that works well. it tracks oxygen levels and charts it for you. ecg also. it shoed my levels dropping low early then higher later. the reason for 4 stars is the battery life. batteries last for 1.5 nights. not that handy eating batteries but it does run sensors all night. for the price its amazing. it will tell you what your looking for and do it easily without setup or connection hassels

A pinch sensitive to positioning on your finger. Use your middle finger and get it in as deep as it can go (comfortably) - on any of these sensors. Sure, you can use any finger, but the larger the skin surface and blood flow, the more accurate the measurement. The laser is basically looking at the color of your blood - through - your skin. So wash your hands (engine oil, sun screen, etc will degrade the reading) and watch out for callouses. The sensor doesn't care about the color of your skin. It cares that it can bounce light off the capillaries I didn't try the the blue tooth feature or download the software, but I did get a reading in my blutooth list that it had found it. It can only be registered for use if the software is installed. My phone would not connect to it because I did not download the software.

I purchased this to help me keep track of my oxygen levels more regularly. It works great. I really like the app feature that keeps track of all of my information on my phone. Small and lightweight, easy to carry. Very affordable.

Came with batteries and a strap. But, the pulse oximeter doesn't work consistently. My pulse read 91, 94, and 25 in three tries within 15 minutes. I had expected that the oxygen measurement would change with deep breathing, the way it does with the oximeter in the doctor's office. But, it did not. I'm returning this because I cannot trust the measurements.

Great vallue and good fit. I will order again