The R4DS Cartridge is the current top-of-the-line in DS SLOT-1 flash carts. It is just an amazing little device like original DS cart size, it is a complete solution with no need to purchase any additional components or deal with any messy software and truly the easiest media enhancer you have ever done; To simply put it, this is a must have peripheral for any regular DS/DS lite owner. This is the Newest packing, smart and Light The weight is only 40g R4DS Functionality: - 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. 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 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. - Supports Action Replay cheat - moonshell 1.6 support Software Reset function( Press START key back to the R4 menu)