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This kind of light is made of Special materials,which can be bent and charged. The light can be used to read book in dark when it is straight,we just need to turn it on and put it near the sentence in the line of sight.As soon as the light is bending up the brightness of light increase,the light can be used as flashlight.
LIANG Ying, WANG Jiaxi, HU Tianpei, QIU Jiaoying