1. Can practice shooting, body posture, ball possession, two-pointers and three-pointers. fixed-point shooting, shooting in the field, casting, etc. 2. Circular network system, can be used for 1-5 balls. 3. 4 models, can select the fixed point, 2 , 3 , 5, ?points. 4. Adjustable service frequency, 2.5-1 0sec/ball. 5. Suitable for size 6 and size 7 ball. Adjustable speed. 6. The height of the ball can be freely adjusted according to the height of the player. The height of drop point is 1.2-2 meters. 7. Speed and frequency can be adjusted according to the player's habits and skill level to achieve technology improvement.