Photofast Dual SLOT Micro sd tf to memory stick pro duo adaptor, CR-5400, Memory card adaptor1.Holds 2 cards for super large capacity Get maximum storage capacity with 2 microSDHC or 2 microSD cards. CR-5400 converts 2 microSD(HC) cards into one MS Pro Duo stick. You can get twice the capacity at a lower price.2.Card types can be mixedCards of different capacity and different type can be used concurrently (i.e.microSD+microSDHC).3.Freedom of expansion and upgrade The adapter works with only one microSDHC card as well. The second slot can be equipped anytime later. You can exchange the cards and upgrade the max. capacity at will! 4.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(HC) cards (when two different types of microSD(HC) cards are used, the slower card sets the speed rate) Product description: Supports 2 microSD/microSDHC cards. 2 microSD(HC) cards of different capacity can be used. If only 1 microSD(HC) cards is used, it must be inserted into slot#1 in order to work When using new microSD(HC) cads, you need to format with a SONY product before you can store data. In order to copy or delete data directly, insert CR-5400 in your card reader. Dont take out the microSD(HC) cards and perform write operations on the single card. Your data will be corrupt. Product Specification: Product name: CR-5400 Supported card types:microSD 256MB 2GB / microSDHC 4GB -16GB Maximum capacity: Depends on the capacity of used microSD/microSDHC System requirements: Works on all OS (PSP/ Windows/ Mac) Package Included:1 x Dual MicroSD TF to MS Pro Duo Adapter