1、Scientific and reasonable design and construction, easy to carry, easy to use, inflatable balls can adjust the size of their own, neck rope can adjust the length, suitable for different height golf enthusiasts. 2、The smart ball will help you understand how your arms and body work during an effective golf swing; it can be used to correctly grasp the swing posture, fix and enhance the muscle memory of the arm distance and prevent arm bending. 3、Through the use of PGA veteran players to improve the use of a beginner and professional coach teaching necessary swing auxiliary training artifact, popular in Europe and the United States. 4、This inflatable smart ball is connected to an adjustable rope to satisfy anyone's needs. 5、It is a good training tool for golf enthusiasts to improve your swing performance through repeated training of intelligent ball practitioners for a short time. Material: PVC Size: about 15cm Weight: about 50g Color: Golf Training Aid: Black, Inflator: Random Color Purpose: professional golf teaching supplies 1 * Golf Training Aid 1 * Inflator (Random Color)