Tennis trainer with 2 balls and rope solo training device for children and adults. String length: 4 m. Package includes: 1 x Trainer Base 2 x training balls. Why choose our tennis trainer? - The tennis rebound ball is made of wool fabric with chemical fibre needles and has a high abrasion resistance. It can jump up to 135 cm wide. - The black rope has a long length of 4 metres, is thicker and more durable. - Designed with non-slip EVA at the bottom of the tennis trainer and anti-wrap binding line. - Super easy to use, just fill the tennis pad with water or sand and tie the tennis ball to the pad. - Free yourself from the hustle and bustle and improve your skills without the help of a partner. - To practice quickly and conveniently anytime and anywhere. - Suitable for all ages such as children, students, teenagers, office workers, middle-aged communities and the elderly. Steps: 1. Fill the tennis base with water or sand. 2. Tie the tennis ball to the base. 3. Gently hit the ball up to prevent the ball from being pulled back to the ground by the rope. Thank you for your trust and support!