... 433mhz, 315mhz Functions & Features of the GSM Alarm System :1.Touch keypad; Big LCD displays, NO EXTERNAL GSM ANTENNA ON THE ... every zone attribute, name, bypass, alarm delay, intelligent door sensor function, beep indication could do free setting.5.Preset 5 phone ... 5MHZ Working Condition: Temperature 10 + 40 Wireless P.IR Detector With Built-in Antenna X1Power Supply: DC9V (inner 9V battery) ...