Please download system file before using the product: http://www.r4-v.com/download-en.htm

Manufacturer's product description:

- 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 pack and memory pack
- 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)
- DLDI auto- patching
- Full download play support