Professional Golf Swing Trainer Aid: This Golf Impact Ball is designed to accurately exercise the correct swing posture and distance between body parts by clamping it between the arms. Through cyclic training, it corrects incorrect swing posture and forms muscle memory for the correct posture, thereby completely correcting incorrect swings Adjustable Lanyard and Ball Size: This Golf Smart Ball comes with an adjustable lanyard and dual adjustable buckle design, which can be adjusted to the appropriate length according to any height and can lock the buckle to prevent slipping. The Inflation capacity of the ball can be adjusted according to the distance between the arms Perfect Gift for Golf Enthusiasts: This Golf Smart Ball is the perfect gift for beginners of golf, suitable for all ages and genders, flexible and adjustable, portable and easy to use Comes with Inflation Pump: Each Golf Swing Trainer Aid comes with a portable inflation pump that can inflate the smart ball anytime and anywhere. After using the smart ball, the inflation valve can be opened and folded for storage, making it compact and portable, and can be reused High Quality Materials: Our Golf Impact Ball is made of eco-friendly flocking and PVC, with good sealing and durability. The flocking surface is skin friendly and comfortable, increasing friction and not hurting the skin of the arms. At the same time, it prevents the ball from slipping during the swing process