♥ Exercise your wrists and hands. The hand enhancement ball is the centrifugal force generated by the interaction between the rotation of the wrist
Smart gravity sensor can be used to feel the centrifugal force and to strengthen your limbs coordination or rehabilitation training. Strengthen
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♥ Exercise your wrists and hands. The hand enhancement ball is the centrifugal force generated by the interaction between the rotation of the wrist
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【Self-starting design】The movement in the ball comes with a spring starting device, no power supply and no rope. Gently press the inner ball with both
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