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Shark fear orange .So we use the orange light can expel shakes.When people use this buoy,he can push the button to open the storage box,the led lamp can extend and floating on the water.When people fell into the sea where surrounded by sharks ,with this buoy he will get a safe space.At the same time,the led light can give the resuce people accurate position.
Hua zhong University of Science and
Jiaqi/Liu Yi/Pang Yunlin/Zou zhenqi, Han