The Swingball Reflex Tennis Trainer is the ideal tennis trainer to help you improve your skills without needing a net, court, or even a partner! A sturdy, non-slip base and a tangle-free rope allow you to practice for hours, perfecting your skills and toning your body. The Swingball Reflex Tennis Trainer is the perfect tool to work on your tennis strokes and maximize your speed while building hand-eye coordination and endurance. It includes an adjustable rope to refine your game. You can also wind up the rope when the Tennis Trainer is not in use to extend its lifespan. The ball is made of rubber. A lightweight air bat is included, making this game perfect for both children and adults. Comes in a full-color box. Suitable for children ages 6 and up.