The Sega CD Backup RAM Cart is a utility that holds 16 times more game information memory than the internal RAM memory of the Sega CD (with its storage size being 1 Mbit total), which is useful for long-playing games and for not having to start over at the beginning every time the player(s) starts a game. It retailed for $60 U. S. upon initial release. The unit plugs into the Sega Genesis cartridge slot (as it resembles a Genesis cart) before the power of the Genesis and the Sega CD is turned on in order for it to be able to start saving game information.