Please download system file before using the product:

http://www.r4ids.com/r4i-download-e.html

Manufacturer's product description:

-Compatible with all DS editions of different kinds of language
-Supports Action Replay cheat
-DLDI auto-patching
-Support SDHC (Micro SD 4G,8G,16G,32G)
-2nd generation storage device (no booting tool required)
-Flush fitting slot 1 card
-Uses MicroSD card, FAT16 or 32
-Supports any MicroSD card speed with no lag in game
-Supports Clean ROM, drag and drop. Works on any OS
-Built in NoPass
-Automatically detect save type
-Save directly to MicroSD card, not to onboard chip
-Supports Moonshell and other homebrew.
-User friendly skinnable interface. Touchscreen or button operation
-Supports rumble pak and memory pak
-Supports the WiFi game, DS Rumble Pak, DS Browser
-Supports changes of the background of Operation Interface
-Support 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.
-moonshell 1.71 support Software Reset function( Press START key back to the R4 menu)