Joy Wrist Trainer Ball

Protect & Train your wrist with the fun Joy Wrist Trainer Ball. First wind up the ball in the direction marked on the ball, then release and hold the ball while rotating your wrist with the ball. Pro Tip: If you follow the resistance on the ball / sound while turning the ball, the ball will spin faster and with brighter lights.  Maintain a minimum level of speed to maintain the lights. Now available for a limited time.