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GYRATE CAUTION-thumb up and notify the pedestrian
People use bike bells is for warning passer-by in any emergency situation. We have to react immediately while emergency happened.However,the bell we place nowadays is not match with users. So we make the bell to run parallel with our thumb and let reaction more quickly.
The bell can revolve not only forward but also backward. You can hold the handle and ringing the bell at the same time As long as you move the thumb, you can manipulate easily and quickly.