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【AUTO START】This new model start with internal pre-tensioner,no starter cords required.Just push to the inner ball and move your thumbs along the

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【AUTO START】This new model start with internal pre-tensioner,no starter cords required.Just push to the inner ball and move your thumbs along the

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AUTOSTART:No starter cord or external battery powered aid needed;physical power generation that allows you to start and stop exercising as you please

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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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