This HDVD800 is a perfect companion to HD800/800S or most audiophile headphones (please check the specs on the manufacturer's website before buying). This unit comes with a power cable. It does not come in the original box, and any drivers or quick start guides can be downloaded from the manufacturer's website. This unit is in great condition as it has rarely been used. There could be some minor scratches due to natural wear, tear and handling. Any minor scratches are only cosmetic, and the unit is working as brilliantly. Genuine buyers only.