... gsm security alarm system 2. 8 wireless defense zones 3. every zone could connect with 10 sensors 4. LCD display Wireless GSM Security Alarm ... groups of timely arm and disarm;7) Can store 6 phone numbers: when alarming, system will make alarm call to these numbers ... ;14) SOS, fire, gas, door, hall, window, balcony, and perimeter places alarm;15) Real-time, delay, 24 hours, bypass Defence zones ...