1. Need cf type ii slot. Supports sd/sdhc/sdxc all capacities. | 2. The eye-fi card will not work in canon 20d, 30d and 40d cameras when used with sd/mmc to cf adapter. | 3. A wifi sd card is required for wifi connectivity! | 4. Sd 3.0 compatible; accepts class 10 or uhs-1 cards. | 5. Supports cf true ide mode / memory mode / io mode.