Q&F Tech Tennis Trainer Rebound Ball Set Portable Self Training Kit Solo Practice Tool for Self-Practice One Training Base with Two String Balls for Beginners/Adults

["【One Person Practice Design】This tennis trainer is designed to be practiced by one person. You can use it anywhere there is hard floor, such as playground, park, tennis court or your backyard to improve your tennis skills. You can also take it as a fun sport exercise indoor or outdoor.","【Portable and Durable】The training base is hollow when you receive it. You can fill it with water or sand to gain weight so that it can be fixed in the place you want when you are practicing. There is anti-slip mat in the back of the base. It is light and portable when you take it and durable when you use it.","【High Quality Ball with Rope】The ball contains 25% wool in the surface and there is a wear-resistant layer in the middle. The inner tank is the latest upgraded rubber which makes it the best quality. The elastic black rope is also helps bounce the ball back when you hit the ball into far.","【Easy to Carry and Storage】There is hand handle design in the training base, as well as a perfect hole to place the ball. You can take it to the play place very easily. There is also an anti-winding design to twining the black rope tidy when you store it, which also helps you unfold it fast when you use it next time.","【1Base+2Balls+Customer Service】There are two balls and one training base in the standard package. We provide one replaced ball for the first time you purchased, if you need more balls, there is a single ball link related. If you have any problems to use this tennis trainer, please click contact seller besides your order. We provide 7X24 customer service for you."]