Masscool PCE-U301 SpecsAdds 2x USB 3.0 Ports to your PCPowered by 4-Pin Molex ConnectionPCI Express x1 Interface Advanced Specifications Masscool PCE-U301Card Bus TypePCI ExpressInterfaceSuperSpeed USB3.0External Connectors2 x USB3.0 portSupport USB transfer speedsSuper Speed 5.0 Gbps, High Speed 480Mbps, Full Speed 12Mbps, and Low Speed 1.5MbpsComplianceBackwards compatible with previous USB standardsCompliant with Universal Serial Bus 3.0 specification Revision 1.0Supports simultaneous operation of multiple USB 3.0, USB 2.0 and USB 1.1 devicesUSB ports are Hot Swapping and Plug-and-Play compliantOS supportWindows Xp/Vista/7Package Includes Masscool PCIe x1 USB 3.0 Controller CardDriver Disc