Display of SpO2, PR. bar graph. Pl and pulse waveform
 Menu operation.
 Adjustable brightness
 PR sound,
 Audible and visible alarm for over-limit and low battery and the upper and lower limit of alarm can  be set
 Battery status indication,
 Data stored and real-time data can be uploaded to PC
 Charging time: 6h
 Continuous working time: more than 1h