Display mode: OLED display
SpO2 measurement range: 0% ~ 100%, (the resolution is 1%).
Accuracy: 70% ~ 100%: ± 2%, less than 70% not specified.
PR measurement range: 30 bpm ~ 250bpm, (resolution is 1 bpm)
Accuracy: ± 2bpm or ± 2% (select larger)
to ambient light: the difference between the value measured in the
state of artificial light or indoor natural light and that of the dark
room is less than ± 1%.
Power consumption: less than 25mA
Voltage: DC 2.6 V ~ 3.6 V
Power supply: 1.5 V alkaline batteries (size AAA) * 2
Safety type: indoor battery, Type BF
* A hanging rope
* A user manual
Weight: 0.1 kg