features：
▪ spo2 and pr value can be stored and real time data can be uploaded to pc with usb
▪ display: oled screen
▪ direction: four directions display
▪ accuracy: spo2: 70%~100%,±2%
pulse rate: 30~99bpm,±2bpm; 100~250bpm,±2bpm
▪ battery: aaax2
▪ dimensions: 58.0x32.0x33.2mm
▪ weight(without batteries): 28.6g
▪ parameters: pulse rate,spo2
▪ indication: real-time battery statues,weak or unstable signal,
value limit remind
▪ application range: adult,adolescent,child