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small circuit and  a 3.7 volt rechargeable battery fitted inside the speaker casing.the charging lead and the lead to your audio device project outwards. 
once the battery is fully charged, you can take it anywhere you want , anjoy the spirit of music.. you can take it to the roof, in the market, even during hiking , it is extremely light in weight and the sound is awesome!!
Интересная идея
Hope you put some details in someday. For now all the parts I can see make it look like you put the input and some batteries in a speaker box and tied them together somehow.

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