This CompactFlash adapter allows you to use SD or MMC memory cards with your Compact Flash compatible camera. Just put the memory card into the adapter and the adapter into the slot on your camera. The data transfer rate depends on the memory card. Technical information: - CF type II - Supported memory cards: SD, SDHC, miniSD*, microSD*, microSDHC*, T-Flash*, SDXC, MMC, MMC 4.0, RS-MMC*, RS-MMC 4.0* * with adapter (not included) - Supports SDXC capacities up to 2 TB (exFAT) - Dimensions (LxWxH): 42.8x36.4x5 mm - Supports IDE UDMA and CF Fast DMA modes