... -265V.9V backup battery.Design for detecting CO+LPG+Natural Gas,work with electromagnetic valve ... or exhaust fan, 1.Design for detecting CO+LPG+Gas, 2.Alarm level: Natural gas: ... 10%±5%LEL; CO: 150PPM. 3.Cordless or Wired Plug Optional, 4 ... ,good stability. 7.LPG Sensor :Adopt semiconductor sensor,CO sensor: Adopt semiconductor sensor. 8.Operating voltage: 85 ...