This listing is for a cardco Incorporated card a printer interface for the vic-20 and the commodore 64. The item is used but in excellent condition it comes in the original box which is in great shape along with the original instruction manual and a couple of personalized correspondence between the previous owner and customer service. I believe he was trying to figure out how to get his printer to work correctly with his commodore 64. As this is old electronics it is being sold as is for parts or repair. I have not tested it because I do not have a commodore 64 or a dot matrix printer to test it on. I cannot guarantee anything about the item other than what you see in the pictures. But overall it looks to be in very good shape and well taken care of. If you have any questions or concerns please feel free to send me a message and I will do my best to answer any questions you have