... the door automatically when arming and unlock when disarming.- Remote controller Arm/Disarm, locate car in parkign lot with sound ... Specification- GSM Working Frequency 850(Optional) /900 /1800 /1900MHz - GPS(SiRFstarIII chipset) , Frequency L1, 1575.42 MHz. - Minimum ... -5meters Connector, SMA- GPS Antenna, Voltage, 3V Cable; Length, 3-5 meters; Connector, SMA - Remote control, Working frequency, 315Hz ...