Compact Flash CF I/II Card Reader Adapter (PCI-e Interface) for ExpressCard 54 Slot (Support UDMA mode 0-6) * Support CF Type I, CF Type II, MicroDrive, PIO mode 0-4, and UDMA mode 0-6 (CF 3.0) Compliant with ExpressCardTM standard Suitable for desktop or laptop equipped with ExpressCard /54 slot Extreme high speed: Transfer file up to 2.5 Gbit/sec (PCI Express Standard) Note: The real performance depends on a CF card speed and may vary based on the computer configuration. For getting extreme transferring speed, driver is required.