Stimulate Dogs Mind: automatic ball launcher challenging them to learn something new. Plays fetch with your dog, interactive features aid in training. Adjustable Distance Setting: Great training tool for both older dogs and as a way to tire out energetic puppies. Entertain and Exercise: your pet indoors and outside with the all for paws automatic fetch ball launcher, this is the premium choice in automatic fetch games. Ball Launcher includes: three standard tennis balls, ideal for a game of fetch. Works with 6 pcs C batteries (not included), or with AC adapter (included).