JGO replacement memory card for Neo Geo AES (Home Console) and MVS (Arcade) systems.   The original SNK memory card carried 2k of battery backed-up ram, enough to hold roughly 20 game saves. The JGO memory card contains 2 separate 16k banks of storage and NO BATTERY required!   Examples of usage: You can save the level that you’re on, like the last level in Metal Slug or the final boss in a fighting game.  You could also save your season data from Baseball Stars, or your current hole in Neo Turf Masters.