SMS Alert Alarm System Wireless Control Panel GSM Alarm System ZMG500-97 Description intelligent LCD GSM alarm system 1 8 wired defense zones,100 wireless zones (Max 100 defense zones)2.Support 2G/3G SIM card3.One key arm function4.SOS, fire, gas, door, hall, window, balcony, and perimeter places alarm5.Power adaptor: DC 12V/1A(Input),DC..