The next time your four-legged friend needs to go outside, he can just ring the bell for service with the Mighty Paw Smart Bell 2.0 Potty Training Dog Doorbell. Teach your dog to this simple, innovative system to communicate potty time without pacing, scratching, whining or barking. The system installs in seconds with the receiver simply plugging into a standard wall outlet; the wireless activators require no batteries or power source of their own and communicate with the receiver from up to 1000 feet away indoors. A water-resistant housing means the system is ideally suited for indoor or outdoor use, so he can also let you know when he’s ready to come back inside!