Model: MK 55100-50, a controller exclusively for the Dreamcast. Includes the instruction manual. This is an EU (European) model, characterized by its blue logo mark, but it is reportedly compatible with the domestic Japanese Dreamcast. *Please note* Although I obtained this as a new, unused item, the box has some tears and overall wear and tear, such as scratches and dirt. However, the controller itself is clean. The instruction manual also has some stains (ToT) Even so, I think it's quite a rare item, don't you think? (´・ω・`)