The foot-powered Dog Pitching Machine launches tennis balls in the air for your dog to catch and fetch. Simply load the included tennis ball into the hole, stomp on the dog rubber dog launcher and watch your dog go crazy chasing down the ball. No assembly required, and since it's foot-powered - no batteries needed. Great for giving pets much needed exercise. Dog launcher measures approximately 11"x 5.5" x 4" WORKS GREAT FOR CATS TOO!