... (DC9V )315M/433M) Wireless signal alarm Dustproof,mothproof Name:CE Approved Wireless smoke electronic optical sensor(DC9V 315M/433M)Model:LS-828-3PFFeature1 ... ,horn series,flash lamp,burglarsystem,security accessory series,CCTV system CE Approved Wireless smoke electronic optical sensor(DC9V 315M/433M)