CE Approved Wireless optical working of fire sensor(DC9V ) 315M/433M Wireless signal alarm Dustproof,mothproof Name ... :CE Approved Wireless optical working of fire sensor(DC9V 315M/433M)Model:LS-828-3PFFeature1.Optical sendsor, ... ,high stability5.Dustproof,mothproof and anti-white light6.Emission frequency:315M/433MModelLS-828-3PFOperating VoltageDC9V 1*6F22 batteryStandby currentLess ...