The PetSafe Automatic Ball Launcher is the premium choice in automatic fetch games. Safety and fun are top priority, meaning your dog can play with the ball launcher with or without their human thanks to multiple safety features and motion sensors. Use with 6-D batteries or with the included power cord. The ball launcher includes two standard PetSafe tennis balls, ideal for a game of fetch. In case you want to mix up the game, adjust one of the six angle settings or one of the nine distance settings to really get the game going. Launch anywhere between 8-30 feet. Don’t worry about your pup over-working themselves while playing. The ball launcher has a 15 minutes interval rest feature to ensure your pet gets the down time they need in between play sessions.