This listing is for a Dolby DP5502 DSTL (Digital Studio to Transmitter Link) Receiver. It was pulled from a working environment, power tested, and powers on as it should. No further testing has been performed on this device. It requires a standard three prong power cord, which will be included with purchase. The unit has attached rackmount brackets. There are signs of wear on the item from previous use. All photos are of the item you will receive. We do not provide tech support for this device. If you have any questions, feel free to contact me.