... /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 sensentivity2.Wireless signal alarm3.Single sided fiberglass PCB4 ... lamp,burglarsystem,security accessory series,CCTV system CE Approved Wireless optical working of fire sensor(DC9V 315M/433M)