Add front or rear panel USB 3.0 ports to your computer case using USB 3.0 motherboard-style headers 4 Port PCIe USB 3.0 Card 2 External & 2 Internal SATA Power UASP Support USB 3.0 Adapter Card with 2x Int Motherboard-Style Headers Native OS Support in Windows 8 and 8.1 and Linux kernel 2.6.31 or later for easy driver installation Flexibility to connect external and internal USB 3.0 devices