When the Sonic Birdhouse is within range of a barking dog, the internal microphones sense the barking and the unit is triggered automatically.
The Birdhouse emits an ultrasonic sound which is heard by dogs but is not detected by humans.
The dog will stop barking when The Sonic Birdhouse emits it high-pitched, safe and effective tone.
The dog will begin to associate their bark with this unpleasant noise. When the dog stops barking the ultrasonic tone will also stop.
The Sonic Birdhouse has 3 sensitivity levels and a test mode to choose from. It is effective up to 50 feet. If you have a large backyard or want to cover a bigger area it is suggest to use 2 Sonic Birdhouses.