This patented smart training ball is made of durable flexible rubber material, designed for golf training and official matches. It helps golfers correct arm separation and posture issues during swings, standardize the connection between upper body and arms, and build correct muscle memory effectively. It is suitable for professional golfers' daily skill training, beginner golfers' posture building, and can be used for both indoor practice and outdoor course pre-match warm-up. It is lightweight, easy to carry, and fits into most golf bags for anytime anywhere training.