sport type tennis color: blue material plastic Age Range () Children About this project DESIGNED FOR SINGLE TRAININGThe tennis self-trainer comes with two high-quality elastic balls and a 13-foot elastic cord. When you hit the ball, the tennis ball bounces again through the traction wire, creating the effect of hitting the ball repeatedly. So you don't need a training object to meet your daily training needs. Smart DesignPortable tennis practice equipment with a semi-circular groove on the top, you can place tennis balls when not in use. The middle part is designed as an annular groove, which can place elastic threads, thus avoiding the trouble of tangling and knotting, and is more conducive to storage. Easy to carryThe tennis trainer is designed as a hollow structure water bottle. After training, you can open the bottle and pour out the water or liquid inside. The 220g weight trainer is easy enough to take home with you. At the same time, a handle is added on the side, making it more convenient and comfortable to carry. Excellent Training EquipmentJust inject water or sand into the base and put it on the ground for training without much waiting and preparation. Made of high-quality tennis ball and elastic nylon thread, it can achieve effective rebound and can be used for a long time. At the same time, it has an anti-tangle hook and a non-slip layer, which avoids the trouble of knotting and slipping of the elastic rope. Wide UseTennis practice rebounds can be used for outdoor training, such as parks, tennis courts, back gardens. It will accompany you to spend pleasant leisure time. The best Christmas or birthday gift for kids