Famicom, NES, and Twin Famicom systems are supported.* Many NES/FC clones supported as well. Cart supports NES and FDS ROM images. Automatic disk side swap for FDS. Expansion audio.** Save State function Game Genie cheat code support. Automatically backs-up saves to micro SD card. There is no need to push reset before shutting down the system.*** Mapper support can be extended via software updates. As easy as loading new mappers files on micro SD card. FAT / FAT16 / FAT32 file system formats are supported. Supports micro SD cards up to 32GB. Quick loading (4-8 seconds approx).