Max ROM size: 8MByte.
Max SAVE RAM size: 128KByte.
Instant loading.
Low power consumption.
High quality 4-layers PCB.
GameGenie cheat codes.
Soft reset to menu.
Supported mappers: MBC1, MBC2, MBC3, MBC5.
SDHC/SDXC support.
Compatible with all systems which supports Game Boy and Game Boy Color cartridges, including Super Game Boy*
OS supports up to 1000 files per folder.
PCB Rev.B (Fixed compatibility problems with Game Boy pocket).
Difference with GB X5: reboot is required to save the current game progress.