The 2-port PCI-Express Interface Card (IFC-PCIE2U3S2 ) lets you enjoy the superior performance of high-speed USB 3.0 devices. USB 3.0 offers transfer speeds of up to 5 Gbps* for much faster transfer and backups and better performance from connected devices.The included low-profile bracket lets the card fit in slim PCs easily, uses only one PCI Express bus, and the ports allow connection of two USB 3.0 devices such as external HDD, USB flash memory, SSD, and other USB devices at the same time. Both ports are backward compatible with earlier USB 2.0 devices.Buffalo's USB 3.0 Interface Card for PCI Express is a simple solution for connecting to and using USB 3.0 devices on your PC. USB 3.0 Interface Card for PCI Express is the best way to upgrade your current PC for use with SuperSpeed USB 3.0.