【Premium Material】Made of high-quality materials, it has strong, durable, and designed to take powerful shots!【Easy to Use】Super-easy to use, simply fill the base with water to give it weight to counter the ball’s motion. The tether cord is connected to a base that serves as an anchor, allowing the ball to bounce back for another volley!【Tennis Practice Device】Its lightweight construction, when empty, allows you to bring it with you anywhere you’d like to practice!【Tennis Practice Training Tool】The Tennis Trainer gives you the freedom to practice anytime, anywhere, and all by yourself! It’s a perfect training tool for both novice and professionals alike.【Solo Tennis Trainer】Get yourself a Tennis Trainer now, and free yourself from unnecessary expenses, a training partner, or a restricting training environment. Free yourself from the hassle of the need to go to the tennis court to practice your volley and hot. Tennis Practice Device, Solo Tennis Trainer Rebound Ball with String Tennis Practice Training Tool for Self, Portable Tennis Equipment for Kids Beginners Specifications: Material: PE Color: Blue Weight：Base 130 g+tennis ball 60 g Base Size：21*21*5cm Package includes: Black rope tennis*2+base*1 Service Description: If you have any questions or needs about our products, please feel free to contact us. We will try our best to meet your requirements and solve your problems quickly and effectively.