Feature
•    Tiny and light, very convenient to carry and use
•    Easy operation of fingertip measurement with one-key control
•    Excellent anti-interference performance
•    Measure and display parameters of SpO2 ,PR (pulse rate) and PI (perfusion index)
•    Synchronous display for pulse column and plethysmogram
•    Color OLED display with 4 directions & 10 modes
•    Audio alarm for dangerous result and low voltage
•    Automatic start measuring finger detection and automatic power off after finger out
•    3.6V rechargeable coin cell for 4 hours with AC charger (100V~250V/50Hz~60Hz)
•    Accurately measure SpO2 measure
•    Accurately measure for PR (pulse rate) with beep
•    PI (perfusion index) display available
•    Beep alarm for abnormal readings
•    2xAAA alkaline batteries power supply with low voltage indication