The key is thick, but is easily transported. There are two slots, one for SD / MMC, one for the M2 / microSD. A small diagram shows as place cards in the key. However, one can only read one card at a time (only on Windows created player) even if a card is inserted into each slot (SD / MMC slot bonus on the other). Tested only with SD and microSD (I have no M2 or MMC). Small regret: the cap is not placed on the ass of the USB key, so the risk of loss (one star less). It is too often forgotten in this type of equipment.
