The Tell Bell is a specialized dog training device that permits a dog to “tell”his owner when he needs to go outside to use the restroom (potty)! Place the Tell Bell beside your door, and train your dog to ring the bell when he needs to go outside. Each set includes two Tell Bells (in one of four colours), a training manual, and a training DVD. Using the Tell Bell training method, you can potty train your dog in a matter of weeks!