... .850-900-1800-1900mhz 2.16 zone wireless, 3 zone wired, 3 relay output 3.send SMS or ... to prevent the occurrence of accidents.. The alarm panel is not explosion-proof and water-proof.. ... The alarm panel can select battery as backup power, but the batteries should be chargeable, the system is ... alarm omissions3. Features of the system. GSM 850/900/1800/1900 bands;8 zone wireless,6 zone wired.. It learns code ...