1.Wireless emitting distance: open area: 150m 2.Emitting frequency: 433MHz 3.Programme code: 1527 4.Working voltage: AC220V; Working current: 70mA alarm current: 160mA 5.Updated nanotechnology, electrical sensors, high reliability, long life 6.Adopt to micro proccessor, low consumption 7.Can detect natural gas, LNG, LPG 8.Alarm level: 10%±5%LEL (5000PPM) 9.Monitor dimension: 20 square meter 10.Manual test, automatic reset if there is no alarm 11.can work with solenoid valve, mechanical hand the fan.