GM8806 Ammonia Gas Detector Portable Digital Display Concentration Ammonia Tester With Alarm

The main function
1. Ammonia gas detection
2.LCD backlight
3. Electrochemical sensor
4. Beep alarm
5. Simple operation
6. Measurement range: 0~100ppm
7. Automatic manual shutdown
8. Power: 2*1.5v AAA battery (without battery delivery)