This product arrived broken and not working at all. I had to repair and adjust battery area to make the thing work. I still don’t have full confidence in the accuracy nor the reliability of this item

Nice device but it doesn’t clamp on a finger very hard, I have to hold mine on to get an accurate reading.

Takes a little too long to have the numbers needed to pop up.

Only works if battery cover is removed. Pulse reading seems correct. SP O2 is close

Takes a little while to read and is accurate most of the time. Definitely not one of the better ones I’ve owned. Would not purchase again.

Bought a second unit and this one was missing the case and wasn’t sealed properly. So, seems like I received a returned unit that is missing parts.

Gives low reading. I have copd, my levels are normally 94. This constantly reads me 85-88 no matter which finger used. Compared at doctors and was way off.

Product seems fine so far, but hoping the poor quality translation isn’t a sign of poor manufacturing. The batteries took a little massaging to make the contacts work and for it to then actually work/turn on.

This device is cheaply made compared to other brands I've used. The configuration inside where you put your finger is shorter than others therefore it feels not very tight when its closed. Accuratecy compares to others I have.

Very nice display and over all physical quality. This product only reads larger fingers. I am 6'1 and it work on my about 75% of the time on my index finger. My wife is 5'3 and it reads her index finger about 20% of the time. I believe the readings are accurate for a home device. If you don't mind playing with for only under $20 it's not that bad.