... gas, door, hall, window, balcony, and boundary places alarm;13. Real-time, delay, 24 hours, bypass defense ... : make alarm when power off.Components listMain panel 1 pc,Remote controller 2 pcs,Siren 1 pc ... ,gas detector,heat/ temperature detector,wireless flash siren,glass break sensor,water detector,panic button,etc ... ; Booth: 35038, 35040 Wireless Intelligent Security Alarm with Indoor Siren YL-007M2B