Sell Fingertip Pulse Oximeter A2 blood oxygen saturation Digital Medical heart rate monitor OLED Elink best price

SpO2:　Measurement range: 70~99% 　　　　Resolution: ±1% 　　　　Accuracy: ±2% (70%~99%), unspecified (<70%) 　　　　Measurement range: 30~240 bpm Pulse rate：Resolution: ±1% 　　　　　　Accuracy: ±2bpm or ±2% (select larger) 　　　　　　Low Perfusion ≤0.4% 　　　　　　1.5V (AAA size) Power：Supply voltage: 2.6~3.6V 8 hours sleep monitoring：Sleep is recorded as a waveform function. Up to 8 hours of waveform data can be recorded Working current：≤30mA Automatically power off when no signal in the oximeter for more than 8 seconds 65g(without batteries)