This listing is for an Audio Alchemy Data Stream Transceiver - With Power Supply. This is a device that is used to connect digital sources with various formats of digital data lines to a digital to analog converter. It also matches impedances.You can input Optical Fiber and output it to BNC and match to 75 or 110 ohm loads.You can input 75 or 110 BNC and match the output line to 75 or 110 ohms BNC. It is in good condition, with some minor dings, shown in photos. Color is excellent. This is guaranteed to be working as it should. This is 100% guaranteed to be as described. I am happy to answer your questions to the best of my ability. PHOTO SHOWS ACTUAL ITEM FOR WHICH YOU ARE BIDDING! NO EMAILS WILL BE ACCEPTED IF THEY DO NOT COME THROUGH EBAYS EMAIL SYSTEM. PLEASE PASS ALL CORRESPONDENCE THROUGH EBAY. NO OTHERS WILL BE RECEIVED. ALL CORRESPONDENCE FROM ME TO YOU WILL ALSO GO VIA THE EBAY MAILING SYSTEM. OUS buyers alert: Dont ask me to lie on a customs declaration form as I will not do it. If there are any problems in your getting your winning bidder email, call me immediately on the telephone number I have on file at Ebay. Bids from bidders with excessive negative feedback will be canceled. NO COD!!