The new R4i card specifically compatible with the DSi, the latest handheld console from Nintendo.
R4i DSi  is an adapter, so you can use a microSDHC card (up to 32GB) with Nintendo DSi.
You can benefit a lot from it, such as,watching movies, playing music, browsing pictures, reading ebooks etc.

R4i Features:
- Support SDHC memory cards (compatibility up to 32GB)
- Change language of menu as you want without any limit
- As same size and thickness as original card
- No need to flash. Build-in launch Slot-2 (gba) function
- Support DMA read and no lag when using any microSD card
- Support FAT16 and FAT32. Can transfer files with PC, PDA, Cellphone and Camera
- Support clean rom and drag-drop to play. Fast loading
- Support NDS and iDS games. Run iDS games on any version of DS
- Write save files to TF card directly and no need manual backup or restore them
- Auto save type detection and no need to update save type list database
- Support moonshell and home brew
- Power saving design. Enter optimization mode automatically
- Double screen UI. Support display thumbnails of games
- Easy to use and setting
- Support button and touch operation both
- Support Wi-Fi and rumble package and browser expansion
- Support change back ground picture of menu
- Support change font color of menu
- Support brightness adjust (DS Lite only)
- Support soft-reset
- Support AR cheat code
- Support soft-reset of moonshell 1.6 (back to main menu of R4 Ultra)
- Support DLDI auto-patching
- Support Download play