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This product design main point is to simplify the design of structure. The bracket can be 360 degree flip also can rotate 360 degrees, in order to better regulate the lamp practical angle and illumination range. When away from the fully closed automatically when bright, when closed odd when the lamp is automatically extinguished, close even time is still bright, is a bicycle on the use of state. Combined with the bicycle is mainly perceived side day high school students go home by bike is not safe at night.