Basic parameters:

Size: 108 mm * 61 mm * 40 mm
Weight: 135 g
Sensor types: electrochemistry method
 (gas catalytic combustion type, special separately)
Destination gas: oxygen (O2), gas (EX), poisonous and harmful gases
(CO, H2S, NH3, CL2, etc.)
Response time: ≤30s(O2); ≤40s(CO); ≤20s(EX);
Time display: the machine is year, month, day, and the clock display function
Display: dot matrix liquid crystal display in Chinese, high brightness white backlight
Alarm: voice alarm more than 90dB (10 cm away from instrument)
Light alarm Red LED
Work mode: continuous work (charged under the condition of gas can work 20 hours or so, other gas 7 days or so, the above is for reference only the standBy time depending on the number of alarm)
Temperature range: - 20 ℃ ~ 50 ℃
Humidity: 15% ~ 95% RH (No condensation)
Power supply: the lithium battery power supply (1500 mAh)
Charging time: 3 ~ 5 hours
Charging voltage: DC5V