The BirdGuard is the ideal addition to your DoorBird. You can see what the visitor does after you have opened the door with the DoorBird. You are always aware of activity at your home. The integrated motion sensor alerts you via a push message to your Smartphone, if an unwelcome visitor appears. You can react to unwelcome visitors in your home from anywhere in the world with your BirdGuard and chase them away by speaking loudly, dog barking or with the connected siren/alarm sound.