This tabletop device uses a high-pitches sound (inaudible to most humans) to teach your dog to stop barking, giving you peace and quiet in your own home. It reduces barking within a few days for most dogs. Simply place it on a table or counter in the room where your dog barks the most. Whenever your dog barks, all pets within range will hear a 2-second ultrasonic tone. You can either set it to go off automatically every time your dog barks or manually press a button. The device covers 25 feet which in a typical home covers 1-2 rooms. For extended coverage, you can add an extra unit for larger rooms or one unit for each room in your home.