The R4i RTS (R4i Real Time Save) 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/DSi owner.
R4i RTS for DSi,DSL,DS Functionality :

• Original Skin & Cheat code compatible
• Excellent Real Time Save Feature . (Not Real time smart help windows )
• Support SDHC (microSD 4G, 8G, 16G, 32G)
• 2nd generation storage device (no booting tool required)
• Game compatibility 100%
• Uses microSD card, FAT or FAT32
• Supports any microSD card speed with no lag in game
• Supports Clean ROM, drag and drop to play. Fast Loading .
• Built-in NoPass
• Automatically detect save type
• Save directly to microSD card, not to onboard chip
• Support download play
• Supports rumble pack and memory pack
• Supports the Wi-Fi game, DS Rumble Pack, DS Browser
• Support changes of the background and font colors on Main Menu and Game Menu manually and automatically
• Supports 4-scale-lightness adjustment
• Supports Soft Reset
• Supports AR cheat code
• Supports Moonshell 2.0 & Homebrew .
• DLDI auto-patching
• Support multi-language .
• Intergraded least Moonshell 2.0 version

What's Include:

• 1 * R4i RTS card
• 1 * Micro SD card reader
• 1 * Protect case
• 1 * Kingston microSD TransFlash 2GB Card

You can download Kernel from offical website:www.r4rts.com