PLEASE NOTE: The product comes with a Christmas card so you can give the product as a gift to your friends or family at Christmas. Stable & DurableTennis trainer rebound ball with string is made of premium high-density PE plastic, sturdy, upgraded nylon high-elastic rubber rope, wear resistance and durability, and can provide a stable ball rebound. Improve SkillsSolo tennis training tool can practice training the winning shots like professional athletes, improve hitting movements, pace and ability and improve physical hand-eye coordination and concentration, athletic ability, cultivate interest in sports. Easy to Use & TrainJust fill the base with water, rice sand or gravel to increase the stability of the tennis practice device. The non-slip bottom strip is not easy to slide, The harder you hit the ball, the faster it rebounds, no need to pick up the ball. Portable & RetractableRubber rope is 15 feet long and can be stretched to 30 feet, can be wrapped around the base to prevent the rope from tangling or shortening its elasticity. With a groove for placing a tennis ball, convenient and practical, light and portable, and can be used anytime and anywhere. Great GiftSolo tennis trainer rebound ball is a great gift for family, children and friends who like to play tennis, suitable for outdoor parks, yards, beaches, indoor tennis courts and other places