... dialer, Then play the greeting back.Arm\ Disarm the system by 5 ways: SMS, Main Host(Keypad), Wireless ... in AC\DC with Low-voltage IndicatorsLearning sensors to alarm host, very easy operation.Non-volatile chip, ... Check door\window status automatically (This is when the system is disarmed only, if a door is opened, ... Product dimension:150×107×26(mm) PSTN Wireless Alarm System (LCD Touch Screen)