For Retro Freak Gear Converter S (Mega Black). Compatible with Game Gear, Sega Mark III, and SG-1000 cartridges. This is a new, unopened item, but it has been stored at home for a long time. It will be wrapped in packing materials, then wrapped in vinyl, and shipped via Yu-Packet Post. "Gear Converter S Mega Black for Retro Freak"