... 110V-240V 5.433mhz, 315mhz Functions & Features of the GSM Alarm System :1.Touch keypad; Big LCD displays, NO EXTERNAL ... 8 wired zones, every zone attribute, name, bypass, alarm delay, intelligent door sensor function, beep indication could do free setting.5.Preset 5 ... etc to the system9.Alarm priority, Reset, activate and disable alarm call and alarm SMS10. We can provide multi-language version,like ...