44mm*28.3mm*26.5mm Weight (without battery) 20.2g ( battery included ) Lithium battery ，Power Consumption : ＜30mA Charging time : 2.5 hours; Stand-by time: 48 hours, Working time :more than 5 hours Pulse Rate Measure range 30~240 bpm Accuracy ±1bpm or ±1% Resolution 1bpm Dual color OLED displays SpO2, PR, , waveform, Pulse bar; 4-direction & 6-mode display provide convenient readings; Setting alarm range of Spo2 and pulse rate Menu- function setting (Beep sounds, etc) Lithium battery; automatically power off; Gravity function, Automatic rotating read （Option） PI- Perfusion Index indication （Option） Type OLED display Parameters SpO2, PR, waveform, Pulse bar