... 2.Intercom function 3.3SMS,3calls on alarming 4.PIR sensor+detector Description and Main functions1.Wavecome GSM module. 2.8 ... wireless emergency button, wireless PIR sensor, wireless door/window contact, wireless smoke detector, wireless gas leakage detector, wireless glass break sensor ... rechargeable battery when power is failure or cut by intruder.10.Wireless signal transmission, and don't fear for ...