"Semiconductor sensor Operating voltage: 85-265V AC; Alarm output: Sound& LED Flash alarm; Alarm level: 10% ±5% LEL. MCU processing adopted,SMT adopted,good stability Malfunction auto-check indicator Dimension: 118.5*82*43mm . Execute criterion:GB15322;EN50194;UL1484 Drivable accessaries: electromagnetic valve and exhaust fan; Can make 9V chargable back up battery "
