HIGH QUALITY MATERIALS: This tennis training kit is made of plastic and rubber, which is strong and durable. Improves speed, hand-eye coordination and endurance. Great Self-Training Tool: This training set can improve speed, hand-eye coordination, and endurance. Improves your alertness, your motor skills and your interest in sports. No need to pick up the ball frequently, not limited by the field, light and portable for personal practice. Easy to use: Just fill the base with water or sand and it instantly becomes heavy enough to hold the unit in place. Anti-slip tennis trainer baseboard make it will not shift quickly during use. and The base can also be used to store the tennis balls and to roll the cord around when not in use, save your space. Good Performance: This tennis baseboard is a good tool for practicing strokes, improving swing speed, or warming up. Excellent textbook for beginners and advanced, light and portable, very light when empty, so this tennis trainer can be easily stowed and carried. Perfect Gift: It is a good gift for friends, family and children who love to play tennis. It can improve your hitting activity, footwork and hitting precision control, as well as your tennis skills, and can be used in many places such as gardens, parks, etc. Product descriptions Specifications: Material: PE plastic and rubber Color: blue Size: 21cm * 21cm * 5cm / 8.27 * 8.27 * 1.97 inch It's the perfect portable tennis training aid. Just hit the ball and it will come back to you! Fill the base with water and it will instantly become heavy enough to hold the device in place. Made of plastic and rubber, it is durable and portable. Great teaching tool for beginners and advanced learners, your best choice! Very light when empty, so it can be easily stored and transported. Easily fits in a tennis bag Specially designed water inlet and outlet, Completely solve past water dissatisfaction problem It could improve your concentration, athletic skills, hand and eye coordination, and develop the interests of the sport. Ergonomically designed handle, make it more convenient and convenient to carry, add 2 large non-slip EVAs at the bottom, excellent cushioning effect Package list: 1 x base 1 x tennis ball with black rope