Home gsm alarm system 1.5 ways of arm/disarm 2.8 wired zones ... 4.One-key arm function, easy operati Wireless & wired alarm system: 1) The host with keyboard and LCD display, it is ... get the first line when alarm and send the alarm system out.(8) When the telephone line is cut or short ... , etc.15) The host adopts AC220V, DC12V/7AH dual power supply. Usually, recharge for battery, when AC power cut, it will ...