The N64 Controller Pak is an external attachment memory card designed specifically for the Nintendo 64 gaming console. With a storage capacity of 256 KB, this gray memory card is compatible with the Nintendo 64 platform and can be attached directly to the controller for easy use. This product, though untested, has the potential to expand the storage capacity of your Nintendo 64 console and allow for more game saves and expansion packs to be stored for an enhanced gaming experience.