The BirdGuard is the perfect complement to your DoorBird. You can see and hear what the visitor is doing when you have opened the door for them. Thanks to the integrated motion detector, you will receive an instant push notification on your smartphone as soon as someone is wandering around your property. You can speak to the visitor through the built-in speaker and hear their response. If needed, you can also connect an external powerful speaker. This allows you to trigger a 100 dB siren sound to scare off the visitor. Alternatively, you can play a predefined sound, such as barking dogs or a siren. This achieves a burglary deterrence rate of about 90%.