Hardware:

• Ace 3DS X has a switch for 3DS mode and DS mode

• 3DS mode-NTRBOOT flashed FLASHCARD. Ace 3DS X has been
  pre-flashed NTRBOOT and supports installing boot9strap on all 3DS
  consoles models & versions

• The using method of Ace 3DS X is a little different from
  other flashcards, and you need to insert one FAT32 SD card(maximum
  capacity is 128GB) to your flashcard

• The other steps of using Ace 3DS X are the same as other
  flashcards.

• DS mode. It is ace 3ds plus, the using method is the same as before.