... ,then play the greeting back. 8.arm/disarm the system by 5 ways :SMS,main host(keypad),wireless keypad ... .check door/window status automatically(this is when the system is dis armed ony,if a door is opened, ... 3.7VWorking power AC=100~230V, DC=12V 1AA .Static Current:Less than 50mAB.Alarm current:Less than 500mA ... . …Power Adaptor ~1 pc. Home Security GSM Alarm System wireless With LCD Touch Keypad CE,FCC