Rechargeable Pulse Oximeter Fingertip Oxygen Monitor Fingertip with SpO2 Pulse Rate and PI RR OLED Precision Fast Oximeter SpO2 Reading Outdoor Sports Home (Black)

Compact and works well
Works well and good quality. I like the carry case and that I can carry both to work.

Great purchase
Works great and accurate

O2
Better quality than others brands, USB , charge last the whole week of work.Other cheaper, I have to throw to the trash, I would only pay 10 bucks, because after you drop it, they brake apart and can not be fixed.So try this one, the way is made with the wires inside the device, nothing visible , so if you drop it, it will dislocate but you can carefully put the two pieces back together so it is easy to fix,To me it worth the money, for people that work in Internal Medicine.

Seems to work but the sensor for hand position is not accurate.
It seems to measure fine but it never knows which way I am holding my hand so the readout doesn’t switch to the right angle, but other than that it does seem to measure well.