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The modern people spend more time on computer because of entertainment and occupation, therefore, the shoulders and wrists get hurt despite the good ergonomics. Besides, the problem is that people fail to act when they sit down for using computer.
Yo Yo Mouse is a green mouse integrating the functions of yoyo and mouse, which generates by playing yoyo; that is, if the mouse runs out of power, it is in need of the power generated by playing yoyo that resolves the damage caused by long-term use of computer to shoulders and wrists.
Yuanlin, Changhua County, Taiwan