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About this item Automatic start, easy to use. Multi-color mixed light, increase fun during practice. Exercise hand & forearm strength, cultivate interest in exercise. Comes with safety lanyard, brand card, instruction manual & gift box. Be careful not to touch the rotating part with your hands during traini..

About this item Self-Starting Gyro Ball This device features a self-starting gyro ball mechanism which means it initiates spinning with a simple wrist movement. There's no need for external power sources or batteries making it convenient for use anytime anywhere. Arm Strength Trainer It serves as an effective arm strength trai..