GSM quad-band module,voice prompt and SMS alarm. 100 wireless and 4 wired defense zones. Blue backlighting Display,Touch keypad. 6 groups of alarm phone numbers, 2 groups of SMS numbers. Auto 10s voice record,support recording playback. Timely arm and disarm. Arm/disarm delay. Alarm call with voice prompt zone number/type. 45 Events record checking,including Arm/Disarm/alarm information. Built-in rechargeable batter y, power cut-off send SMS alert.