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Extendable Sound Performance You no longer have to compromise performance in your portable audio experience. The Diamond Mini Rockers are a pocket sized power house with a patented retractable cable system so you don’t have to worry about carrying extra pieces or cords getting tangled during transport. These portable mini speakers magnetically fasten together and are only 2”x4” when connected, making it the perfect size for quality sound on the go. Each speaker twists open to expand for extra resonant bass.