APP CONTROLLED: Know who's stopped by your door, even when you're out. With HD 1080p live viewing and motion detection all via the Yale View App BUILT IN LIGHT & SIREN: You can turn the security light on and off or you can activate it so it only turns on when it detects movement. If you have to turn the siren on at the same time with the lights you can all via the App. MOTION DETECTION: Receive instant alerts when someone approaches your door. REAL-TIME CONVERSATION: you can communicate and advise the postman to leave your package with a neighbour. WORKS WITH: Google Assistant, Weight: 1.322773572 pounds, Manufacturer: Yale