Lexar Professional CompactFlash Readers (USB 2.0 and Firewire) are designed for pro photographers and serious hobbyists who are looking for maximum workflow speed with professional level durability and looks. The CompactFlash Reader will make downloading CF cards your from important photo sessions a breeze. The CompactFlash Readers are stackable and designed to connect multiple readers to a single connection. Up to four Firewire CompactFlash Readers can be connected using Firewire daisy-chaining and up to four USB 2.0 CompactFlash Readers can be connected to the specially designed Lexar Professional 4 Port Hub USB 2.0 for fast, simultaneous CF card downloading. Lexar Professional CompactFlash Readers support Lexar's exclusive ActiveMemory(AMS) and LockTight technologies that enhance the features in your digital cameras and media processing software. With AMS, important settings can be saved to the card to prevent reentering or retyping these settings each time.