PiSector Cellular GSM Quad-Band Home Security Alarm System Pack, Auto Dial, LCD Display, 433MHz 7 wired and 99 wireless defense zones. LCD screen with time clock display. 3 groups of timely arm and disarm. Call 6 phones and send SMS to 3 numbers; 10 second automatic message recording. Voice prompt for main unit & remote operations Built-in artificial intelligent English message. The main unit can be used as a telephone. Arm, disarm, monitor, and intercom by phone. Real-time, Delay, 24 hours, Bypass defense zones program. One-key-control: all the settings can be finished by keypad. Built-in NI-HI battery, AC-DC shift, automatically recharge.