It& 39;s the perfect portable tennis training aid. Unwrap the cord and hit the ball as hard as you& 39;d like. The harder you hit the ball, the faster it will back to you. Made of new material, it is odorless, thick, wear-resistant and super practical. Fine design, it has a non-slip rubber base, so needn& 39;t a ball machine or wall. It is lightweight and portable that can be set up anywhere and stores easily._x000D__x000D_Features_x000D__x000D_- Color: Blue._x000D_- Material: Plastic._x000D_- Size: 21x21x5cm._x000D_- Made of new material, it is odorless, thick, wear-resistant and super practical._x000D_- Fine design, it has a non-slip rubber base, so needn& 39;t a ball machine or wall._x000D_- It is lightweight and portable that can be set up anywhere and stores easily._x000D_- It& 39;s the perfect portable tennis training aid. Unwrap the cord and hit the ball as hard as you& 39;d like. The harder you hit the ball, the faster it will back to you. It& 39;s a great teaching tool for beginners and single person practice._x000D_- Build quickness, hand-eye coordination, and stamina. To shorten the time, you can also wrap some of the cord around the base._x000D_Warm Tip: Dear buyer, due to lighting effect, monitor& 39;s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you Packing list:1 Set x Tennis Trainer Baseboard Tennis Self-training Tool Equipment for Beginner and Intermediate Players Blue