?ARE YOU LOOKING TO IMPROVE YOUR TENNIS SWING?? NEED TO WARM UP BEFORE A MATCH? TRAIN SOLO LIKE A PRO, ANYWHERE! ? Our training device bounces your tennis ball back and forth with vigorous force, thanks to a sturdy tether cord that’s connected to the anchoring trainer base. Bounce back and back again with increasing confidence. ? Made of high-quality polyethylene plastic, the base is sturdy and durable. All you have to do is fill it with water (or sand, whichever you prefer) to keep it put. ? Super lightweight when empty, this trainer tool is easy to carry and take with you on the go, from the gym to park to the backyard. ? Our expert tennis trainer gives you the freedom to practice anytime, anywhere, all by yourself! No human tennis partner necessary! ? It’s a perfect training tool for both novices and professionals alike. Don’t brave the court crowds or weather by having your training partner available when you need it, wherever you need it. ? Practice your forehand, backhand, serves, and more right at home. No pay-as-you-go ball-serving machines or coaches are necessary. Specifications: Material: Polyethylene plastic Color: Blue Size: 8.3 x 8.1 x 2,2in Rope Length: 150in (stretch to 300in) Capacity: 33.8oz (filled with water or sand) Package Includes: 1 x Tennis Trainer Tool (includes ball, base, and rope)