Nintendo DS R4 card, also called R4, R4 cards, R4 Revolution, R4i.
It includes those DS fire cards, like R4DS, R4 SDHC, Red R4i SDHC, DSTT, DSTTi cards, R4 Ultra, R4i Golden, R4i Gold revolution, R4i RTS and etc.

Red R4i SDHC

R4i-SDHC is SLOT-1 flash cards for NDS console series(support DSi). It is upgrade versions of R4 with multi-media features which can support SDHC and run most games and homebrews. It has widely been owned Coinstar fees by many NDS player users.

R4i-SDHC is tested to support All version of DSi,like Japan,Euro and U.S version.

R4i-sdhc can be compatible with the NDSi Firmware V1.4 well

We have released new cards to be used in the dsi v1.4 which was packed in the new package marked 1.4, since Sep 20th.

Functionality

Able to memorize and restore to the previously selected game or application after restarting machine and soft reset.
Sleep mode function, for power saving and longer standby time.
Multi-languages are optional, they are Simplified Chinese, complicated Chinese, English, Japanese, French, German, Italian, Spainish and Dutch.
Friendly interface, easy to operate.
Realtime smart help windows.
Integrated the latest Moonshell 2.0 Beta version.
Game compatibility: 100%.
No need to flash. Built-in launch Slot-2 (gba) function.
Support SDHC micro sd cards (4GB, 8GB, 16GB, 32GB).
Support DMA read and no lag while using any microSD card.
Support FAT16 and FAT32. Files can be transferred with PC, PDA, Cellphone and Camera.
Support clean rom and drag-drop to play. Fast loading.
Support NDS and iDS games. DS games can run on any DS versions.
Files are to be saved directly to TF card, copy or restoration is not required.
Automatically recognise saved new game types, no need to update the database.
Support moonshell and home brew.
Power saving design. Enter optimized mode automatically.
Double screen UI, abbreviated picture and game title display, button and touch operations.
Easy to use, setting or adjustment is not required.
Support Wi-Fi, rumble pack and browser expansion.
UI background can be changed.
4-level brightness adjustment.
Support soft reset.
Support AR cheat code.
Support soft-reset of moonshell 2.0 (back to main menu of R4 NDSI by pressing START button).
DLDI auto-patching.
Support Download play.