... 3. every zone could connect with 10 sensors 4. LCD display Wireless GSM Security Alarm SystemsFunction Instruction:1) Built-in ... fire, gas, door, hall, window, balcony, and perimeter places alarm;15) Real-time, delay, 24 hours, bypass Defence zones programming function ... to add additional wireless accessories;17) Remote control Arm, Disarm, Monitor, and Intercom by phone;18) Event record check: the ...