Using the Swingball Reflex Tennis Trainer is easy. First, place the all - surface base on a flat area. Then, attach the reflex cord to the base and put the rubber ball on the end of the cord. Grab the lightweight Airbat and start hitting the ball. You can adjust the reflex cord to your preferred length for different levels of play. Remember, this trainer is for ages 6 and up, so make sure younger players are supervised. When you're done using it, wind the cord back to increase its lifespan. Keep the base clean and dry to maintain its sturdiness. If the ball gets dirty, you can wash it with mild soap and water. Enjoy your tennis training with this great tool!