... alarm when power off.Components listMain panel 1 pc,Remote controller 2 pcs,Siren 1 pc,PIR sensor 1 pc,Door sensor ... sensors/ detectors if needed) Pet-immune PIR sensor,smoke detector,gas detector,heat/ temperature detector ... ,wireless flash siren,glass break sensor,water detector,panic button,etc.main panel ... Booth: 35038, 35040 GSM Wireless Home Burglar Security Alarm with Intercom YL-007M2B