Thank you for viewing. This is the sound source that came with the Musi-o 500. I am listing it because I am unlikely to use it in the future. I have confirmed that the power turns on. It has been stored indoors for a long time. It is considerably discolored. Please judge the condition from the photos. This is a listing for the main unit only. *No power supply included Please note that this is a used item and no claims or returns will be accepted. Thank you for your consideration. Type...Sound Source