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2.Micro USB terminal for charging ; additional USB terminal for emergency charging for others.
3.Letters can be customized according to requirement. STOP/SLOW/GO/PARE/SIGA,etc.
4.Built in tilted sensor. When power on, the paddle light up when you raise it and off if tilt.
5.Battery changeable design, simply screw the bottom of the handle, and pull out/push in the battery case.


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