Sleep monitoring function: It can monitor the data when people rest. And there will be a data analysis after monitoring for more than 2 hours.
PI Indicator: Perfusion Index. It reflects the amount of blood flow being measured by the oximeter. A health care professional tests blood flow to establish norms and aid in identifying changes in a patient's condition. 
Multi-direction display: Rotatable multidirectional display.2directions, 2 modes, allow you to view your results in any direction.
Alarm function: Set the alarm and beep according to your needs. There will be a warning once the measured values go beyond the setting. Know it immediately.