The device is very cool for this price (5.43$)! Its SpO2 detection seems correct. SpO2 drops when I'm holding my breath. Only problem is that there is some delay of measurement. It's 10-15 seconds but I don't know, maybe it's a normal thing for pulseoximeters. Pulse detection is almost the same with my Mi Band 5 so I think it's also more or less correct. The case for the device is way too large for it. But again, for this price everything is great!
The device is very cool for this price (5.43$)! Its SpO2 detection seems correct. SpO2 drops when I'm holding my breath. Only problem is that there is some delay of measurement. It's 10-15 seconds but I don't know, maybe it's a normal thing for pulseoximeters. Pulse detection is almost the same with my Mi Band 5 so I think it's also more or less correct. The case for the device is way too large for it. But again, for this price everything is great!