... Wireless optical smoke detector(DC9V ) 315M/433M Wireless signal alarm Dustproof,mothproof Name:CE Approved Wireless optical smoke detector(DC9V ... 315M/433M)Model:LS-828-3PFFeature1.Optical sendsor,high sensentivity2. ... flash alarmBusiness TypeManufacture Product/Service (We Sell)Detector series,horn series,flash lamp,burglarsystem,security accessory ...