1:100-240V operating Voltage 2:Wall installation 3:Auto-check sensor failure 4:Can work with electrovalve Gas Detector Alarm FS0801C Target gas methane ,LPG, coal gasConcentration 25%LELTemperature -10oC-55oC(in room)Humidity ≤95/%Storage humidity -25oC-55oCStress 86-106KpaValidity period five yearsWorking place in roomWeight: 0.3KG/PCSMeasurement : 110mm*75mm*35mmPackage: 80mm*130mm*50mm