If your dog’s favorite hobby is barking, help him get centered in silence with the PetSafe® Ultrasonic Bark Control Collar. This collar uses a high-pitched tone that’s triggered when your dog decides to speak up. The ultrasonic tone is inaudible to most humans but is annoying to dogs. They’ll quickly learn to associate their barking with the unpleasant sound. Your furry friend will typically stop barking within the first few days of wearing the collar. If they already have a favorite collar (what dog doesn’t?), the bark control unit will fit on other collars up to ¾ inches wide. The collar is lightweight, water-resistant, and comfortable so your tail-wagger can wear it anywhere they need a reminder to keep quiet.