... 6.Can store 3 SMS numbers: when alarming, system will send alarming SMS automatically;7.10-second ... Arm;12.SOS, fire, gas, door, hall, window, balcony, and perimeter places alarm;13.Real-time, delay, 24 ... schematic diagram:Alarm Panel back schematic diagram:Alarm system LCD playerWired terminal block:Standard pack components 1 ... manual Hot sale GS-M2B GSM alarm system with best price and quality