... products are gsm alarm,wireless alarm,mms gsm alarm,power alarm,IP camera,smoke detector,gas detector,child alarm,etc.. Product ... siren 11) Back-up battery group: When the power off, AC and DC power switch automatically. 12) long-distance operation by ... main controller will alarm. Technical data: 1) Power: Power adapter provide DC12V 1A 2) Standby power: DC12V(chargeable battery groups) 3) Working ...