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Echo light stick is a concept light stick that uses sound to generate electricity, in order to replace the current disposable light stick and to make it reusable. It changes sound into electricity by using the new technology and it glows brighter when the people in the concert yell louder.
Echo light stick varies its brightness with the volume. And also it makes special visual effects or changes its color because of the volume.
After the concert, Echo light stick can be placed in the wall outside the concert hall. When cars and motorcycles pass by, the new light sticks can absorb the noise and charge the battery simultaneously.