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{bestofferbuy.com} It's a very small 4" car subwoofer with a built-in MP3 player expandable via USB or CD card.
From a chinese site but £22 delivered ...
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Various head unit with AM/FM & media slots
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{bestofferbuy.com}
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{bestofferbuy.com} £18 to 24 delivered
Crap'ness probably guaranteed...