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This is a type of camping light and call light, which is powered through a stream. It is also a mobile power and it can be used for electric products like mobile phones in an emergency.
The impeller of the hydraulic generator can be put inside the body of the light. The height of the triangle support can be adjusted according to the height and the land form at the bottom of the stream.
By using this light,not only water but also electrical energy can be got from the running stream.