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This pen is designed especially for the majority who can't help spinning pen when they hold one. The rotary motion or the vibration of daily use will transfer into energy saved into the battery inside the pen. These electricity will support display of the charge-capacity and offer electric output for mobile phone or other device via the USB port.The LED screen above is calculating the quantity of electricity you have generated.
South China Agricaltural University
Guangzhou,Guangdong, China
South China Agricaltural University
Guangzhou,Guangdong, China
Shiying Wu