It's the simplest model for Sega, please see the differents with Mega X5 on the last picture.
Almost 100% SEGA games are supported(Sega CD Ram cart not support).
64mbit (8mbyte) PSRAM.
56mbit (7mbyte) max ROM size.
FAT32 file system supported.
Micro SD cards up to 32GB.
Fast loading (2-4 sec).
Built in audio playback.
GYM, TFC Regular game battery back-up saves.
Genesis, Mega-drive, Sega Master System, and 32X games supported.
CD BIOS loading.
Game Genie and Play-Action Replay format supported.
Reset is required to save the current game progress.