This listing is for a Digital Link Prelude Encore T1 DSU/CSU (100-01900-01). 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. There are light signs of wear on the item from previous use. All photos are of the item you will receive. We do not provide tech support or any software that is not already installed on this device. If you have any questions, feel free to contact me.