R4 ii upgraded functionality: 2ND generation storage device(no booting tool required) Flush fitting slot 1 card Support Micro SDHC 1G 2G 4G and 8G card Uses Micro SD card, FAT 16 or 32 Supports any MicroSD card speed with no lag in game Supports Clean ROM, drag and drop, Works on any OS Buit in NoPass Automatically detect save type Save directly to MicroSD card, not to onboard chip Supports Moonshell and other homebrew. Open I/O interface User friendly skinnable interface. Touchscreen or button operation Supports rumble pak and memory pak Supports the WiFi GAME, DS Rumble Pak, DS Brower Supports changes of the background of Operation Interface Supports Skin DIY by setting background and font colors on Main Menu and Game Menu manually and automatically Supports 4-scale-lightness adjustment(ds lite only). Supports the soft reset. Supports Action replay cheat Moonshell 1.6 support Software Reset function(press START key back to the R4, menu) DLDI auto-patching