I do not know much about this I got it in a storage unit auction and it is in okay shape for its age. The brand seems to be Leading Edge and there are five pins on the cord please see photos email me with any questions I could not find a model number anywhere on this unit look at the photos for condition. I do not have time to take this thing apart and check what colors are on the bottom of keys or any other random things I've been getting asked to do to this. Please know what you are buying and see all detailed photos.