This R4 chip supports SDHC memory card, namely, users can store more games/music/movies and faster gaming speed via this R4 cartridge, not like the old R4DS card with only 2GB compatibility.
To be the easiest enjoyment, you need ...
- R4 SDHC card - An adapter between games and DS console
- Memory card - to store driven software kernel and downloaded ds games/music/movie
- DS Phat / DS Lite console (DSi/DSi XL/3DS/3DS XL not compatible)