[High Quality] The base of the tennis trainer is made of high-density materials, which are very tough and durable. The bouncing tennis ball is made of chemical fiber woolen fabric, which has strong resistance to abrasion and good elasticity. The attached rubber cord is thick enough and durable. In short, the tennis suit is of good quality and practical.[Water inlet and outlet] Tennis training equipment has a water inlet and outlet design. By filling the training tool with water or sand, and then providing a non-slip design at the bottom, the stability of the base of the drive device is improved. The spherical groove design perfectly fits the attached tennis ball.[Self-Taught Tennis Training] Rope rebound tennis is very useful for solo tennis practice, it can improve your concentration, exercise ability and hand-eye coordination. Simple and practical. Of course, this will also allow you to master tennis skills during self-study.[Unique and practical design] The base of the tennis trainer is designed with round holes. Simply connect the rubber rope to the tennis trainer ring to start a single tennis workout. The handle design on the side of the trainer makes it easier to transport the tennis trainer. It can also be used to increase the load of the training device and increase stability.[Portable Set] The tennis training set is very portable. Before being filled with water and sand, the tennis base is light and easy to carry. You can easily take the tennis trainer outside and start a single workout. In addition, the tennis trainer has simple accessories and is easy to store.