FEATURE 
- 2,8 inch color TFT LCD display for SPO2 & PR
- Silicon rubber shell for easy protection
- Compatible with Nellcor Spo2 Sensor
- USB port support download test results to computer
- Automatically switch off within 3 minutes when no signal
- Adjust the parameters in friendly menu
- Inner flash memory can store testing result up to 300 hours
- Stable bracket for table usage
- Support rechargeable Li battery and 4XAAA Alkaline battery
- Low battery voltage indicator