Main unit, power cable. Operation confirmed. - There is some minor crackling from the knobs, but it is slight. (No crackling occurs when the knobs are not being moved. There were no points where the sound cut out.) - No crackling was found on the faders. The item will be shipped after dust removal with a duster, wiping with a cloth, and basic cleaning of the terminals. *Please note that this item is also listed elsewhere, so it may be sold out due to a timing difference.