features：
▪ display: hd led screen
▪ accuracy: spo2: 70%~100%,±2%
pulse rate: 30~99bpm,±2bpm; 100~250bpm,±2bpm
▪ battery: aaax2
▪ dimensions: 58.0x32.0x33.2mm
▪ weight(without batteries): 28.7g
▪ parameters: pulse rate,spo2
▪ indication:low battery remind,value limit remind
▪ application range: adult,adolescent,child