1、Suitable for all skill levels: Adjustable string length, simulating various striking distances, suitable for beginners and advanced players. 2、Multifunctional training aid: Improve speed, hand-eye coordination, endurance, and overall game performance. 3、High-quality material: Made of PE+plastic material, lightweight and durable, anti-slip base and water storage device enhance stability. 4、Portable design: Equipped with a portable handle, suitable for indoor and outdoor practice. 5、Can inject sand, gravel, water: Increase stability, adapt to various training environments. This trainer is your ideal training partner, no need for others to accompany, you can improve your skills anytime, anywhere. Features: Suitable for all skill levels: Adjustable string length, simulating various striking distances, suitable for beginners and advanced players. Multifunctional training aid: Improve speed, hand-eye coordination, endurance, and overall game performance. High-quality material: Made of PE+plastic material, lightweight and , anti-slip base and water storage device enhance stability. Portable design: Equipped with a portable handle, suitable for indoor and outdoor practice. Can inject sand, gravel, water: Increase stability, adapt to various training environments. Specifications: Colour: yellow, blue, light blue, red(optional) Main Material: PE+Plastic Ball Diameter: 74mm/2.9in Size: 21x21x8cm/8.3x8.3x3.1in Weight: 250g/8.8oz Package list: 1 x Single Player Trainer 1 x Single Player Trainer