ith its plug-and-play design and smartphone control,When a window or door sensor is triggered, a loud alarm sounds to create an effective deterrent, and a push notification is sent to your iOS or Android(TM) smartphone for immediate notification, no matter where you are. It has a backup battery that provides 60 hours of performance in case of a power outage. The control panel has curved edges and an elegant design for a discreet security solution that complements any décor. The alarm system allows you to add on additional wireless contacts, motions sensors, and gas and smoke detectors to suit your needs