Sonnet"s Pro Dual CompactFlash Adapter Express Card/34 enables you to transfer files concurrently from two CF memory cards to your MacBook Pro on-location or in the field, studio, or office. Pro Dual CompactFlash Adapter Express Card/34 supports the fastest available CF memory cards and future CF cards up to 886x at full speed, making it a superior alternative to USB memory card readers. Not only is it fast, its compact size allows it to fit into a gear bag, with no dangling cable. Unlike common CF adapters, Pro Dual CompactFlash Adapter Express Card/34 uses the 2.5 Gbps PCI Express interface incorporated into Express Card slots, so it delivers performance superior to adapters that depend on the Express Card slot"s slower USB 2.0 interface. If you"ve been using CF cards for a while, you may even have a Microdrive in your gear bag - Sonnet"s adapter can handle it. Pro Dual CompactFlash Adapter Express Card/34 accepts two Type I (flash memory) cards or a combination of one Type I and one Type II (hard drive) card. If you"re a photographer or videographer using equipment that relies on CF cards, this Sonnet adapter will save you time and improve your workflow