- Display mode:Dual-color OLED display(blue and yellow)
- Power Supply:Two 1.5V (AAA size)alkaline battery
- Battery Voltage: DC2.6V~3.6V
- High accuracy and durability
- SpO2, Pulse Rate, Bar Graph,Pulse Waveform display
- Low battery indicator
- Automatically power off function
- Six models adjustable by pressing the button shortly
- Four levels of adjustable brightness