PetSafe PBC00-15266 Indoor Bark Control, Battery, 25 ft Control

The indoor bark control automatically deters your dog’s barking, bringing peace and quiet to your home. Using the adhesive-backed hooks, simply place the device on a wall, door frame or table in whichever room your dog barks the most. Whenever your dog barks, the device emits an unpleasant ultrasonic tone that's inaudible to most humans. Your dog will learn to associate his barking with the high-pitched sound and stop barking. Most dogs bark less within a few days.