Design for Fun: All For Paws Interactive Ball Launcher is an automatic fetching machine that can be used by dog and owner or just the dog. The launcher features make independent play easy and fun, all you have to do is plug it in, choose your launching distance and then drop in a 2 inch mini ball.Launch Distance Adjustable: The ball launcher can launch the ball 10, 20 or 30 feet, which can easily be changed with the push of a button.3 Tennis Balls Included: Please only use our All for Paw tennis balls to avoid function disability, other brand tennis balls are not compatible. The ball launcher works with 6 pcs C batteries ( not included ), or with AC adapter (included).ADVICE OF USE: Always supervise your dog while playing. Some toys may be inappropriate for your dog. Remove and replace the toy if it becomes damaged.MONEY BACK GUARANTEE: Your satisfaction is our priority. All our products are backed by 1-year warranty, please feel free to contact us if you have any questions