... shut-off Valve can cut gas sources 5 SECIFICATION:1, Power supply: AC220V 50MHz2, Start warm-up current: ≤60MA3, Working voltage: 6VDC4 ... , Static consume: 1W7, Alarm consume 2W8, Alarm volume: ≥90dB 9, Working environmenttemperature15ºC50ºC Humidity: ≤97%RH 10, Alarm density: Coal ... : frequent on or off signal, control exhaust fan, electrical magnetic valve signal.