The Automatic Tennis Ball Launcher is the ultimate interactive pet toy. Your dog will love fetching and returning tennis balls over and over again. Simply drop a ball into the hopper and watch it soar up to 40 feet in the air. After a little training, your pet can even operate the launcher all by himself. Features carry handle and optional sound alert. Compatible with all standard tennis balls. Includes 1 tennis ball and 1 all-weather ball.