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No science or technology involved. You just put the same color set of two on a cable, one at each end. So when you go to unplug a cable from one end, you exactly know which one you are taking out. You need these if you have a clutter of wires behind your TV.
I would recommend:
Sorry, there was a problem. Please try again later.you have to connect the wires to the tv set. its a wireless sub wolfer however.
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