SIIG DP 2-Port USB 3.0 PCIe instantly adds two SuperSpeed USB 3.0 ports to your pcie-enabled desktop computer. This adapter enhances existing computer system by enabling the latest USB 3.0 technology to deliver maximum data transfer rates of up to 5GB/s to support high-bandwidth USB 3.0 devices, such as external hard disks, high resolution Webcams, video surveillance cameras, digital video cameras, multi-channel audio and more. The DP 2-Port USB 3.0 PCIe is backward compatible with USB 2.0 and USB 1.1 devices and features dual-profile PCB design to work with full height and low profile chassis system with the included bracket. The DP 2-Port USB 3.0 PCIe host adapter is fully compliant with USB 3.0 specification, revision 2.0 and PCI Express base specification, revision 2.0 standards. It comes with FCC Class b (doc) & CE Regulatory Approvals and RoHS compliancy, is fully compatible with a wide variety of Windows operating systems.