PhotoFast CR-5400 MicroSD to MS Pro Duo Adapter Dual Slot Supports 2 microSD/microSDHC cards 2 microSD(HC) cards of different capacity can be used. Card types can be mixed The adapter works with only one microSDHC card as well. The second slot can be equipped anytime Super high read/write speeds of 10MB/s and up CR-5400 is made of high quality components and preserves the original speed of the inserted microsd