DS original cartridge size, Slot1 interface. 
.Plug 'n Play, easy to use, just Drag 'n Drop file from PC to flash memory card. 
.No FlashMe, built-in NoPass, and the GBA cards in slot2 can be started directly.  
.Supports CleanROM, No covert. 
.100% SDHC TF and standard TF compatibility up to 4TB(4096GB) flash memory card. 
.High speed SDHC. Supports any TF card speed with no lag in game, 
Save directly to TF card, not to onboard chip, Never lose your saves.  
.Automatically detect and generate save type. 
.Supports Moonshell and homebrew. DLDI auto-patching. 
.Supports FAT/FAT32, works on any OS. 
.Supports Action Replay cheat and edit the code base. 
.Built-in energy-saving design.  
.User friendly skinnable interface. Touchscreen or button operation. .Supports Skin DIY. 
.Supports the “Hot-Key” SOFT RESET.  
.Supports the WiFi game, DS Rumble Pak, DS Browser.  
.Supports Download play.  
.Supports 4-scale-lightness adjustment ( DS Lite only ). 

http://www.ndstt.com/product.html