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One important feature of USB is that the cables distribute power as well as data. This means that devices that use modest amounts of power don't require separate power supplies, resulting in fewer big power cubes at your wall outlet and fewer cords running across your desk. The power adaptor is only really of use if you have devices that are drawing too much power at the same time and this kicks in to compensate for the drain. Why pay for this expensive power adaptor, if you don't need it? Just buy the LINDY USB SMART Hub!