This product is believed to be supported by M3 team but have amazing low price and good support in future.
Kernel is the same with R4i RTS,which can be downloaded on official site: www.r4rts.cn

R4 SDHC Functionality:

• 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 included:

• 1 x R4 SDHC chip
• 1 x MicroSD 2.0 Card Reader