Slot 2 expansion card for the Nintendo DS.
Needs to be used with a Slot 1 card (M3, R4, TT, etc.).
Performs 3 functions:
Is a rumble pack
RAM expansion (for programs such as the Opera Internet Browser that would normally require the official RAM expansion pack)
Plays GBA ROMs (whereas Slot 1 cards don't)
There is software for it which you put on your Slot 1 card and use to switch between modes. GBA ROMs are stored on your Slot 1 memory and you use the software to copy a ROM onto the EZFlash in Slot 2, then boot from it as if an original GBA game was in there. GBA save games are stored on Slot 1 so you can easily switch GBA games on the move simply by copying a new one from Slot 1 to Slot 2.
Very handy device to have if you want to add more features to your DS. I had trouble finding this but now have an M3 Real which came with its own Slot 2 card.
Payment by Paypal or bank transfer. £12 including delivery by Royal Mail First Class Recorded.