Wrist Power Ball LED Auto-Start Grip Gyro Ball Gyroscope Trainer Hand Muscle

About this item   [How to use]The movement in the ball comes with a spring starting device, Gently press the inner ball with both thumbs and wind it fully in the direction of the arrow. Then you can easily start the ball by rotating your wrist in a single hand. [Mechanical power lasting] The centrifugal force generated by the interaction between the rotation of the wrist and the inner rotating ball core maintains the high-speed and lasting operation of the ball core. [Light and portable]The moderate size and weight are easy to carry around, whether it is the office, the gym, home or travel, you can easily exercise and decompress at any time. [Assisted rehabilitation]Wrist ball training can promote blood circulation, Wrist power ball can mainly exercise the muscle groups of fingers, wrists, arms and other parts, including the strength and flexibility of forearm muscles, biceps, triceps and deltoid muscles.