... super market,office,office premises,warehourse,base station,kindergarten,schoolroom,business hall,bank,financial office,work shop,villa and government etc ... .it is installed where the video alarm system are needed. Features:Support 2G GSM 850/900/1800/1900HZ ... at any time;Remotely control alarm host by SMS or phone;Compatible with wired/wireless detector;Support burglar alarm, fire ...