Integrated with SPO2 probe and processing display module. ■ Can be used in: hospital, home, community medical treatment, sports healthcare, etc. ■ Can measure SPO2 and PR accurately ■ SPO2 and PR display, PR waveform and bargraph display ■ Battery voltage low indication ■ Four directions and six modes ■ Four levels adjustable brightness ■ Low power consumption; shut off automatically when no signal ■ Small volume(57(L) ?31(W) ?2(H) mm)、light,convenient to carry ■ 1.3' double Color OLED display, resolution 160*64 ■ Spo2:35~99% Pulse Ratio:30~250BPM ■ Resolution: 1% for SPO2, 1BPM for pulse ratio ■ Accuracy: ±2% (70%~99%), unspecified (<70%) for SPO2, ±2BPM or± 2% (select larger) for pulse ratio ■ Power: 1.5V (AAA size) alkaline batteries ?2 ■ Can work more than 30 hours continuously ■ Interference resistance capacity against ambient light and measurement performance at low perfusion