Features and Benefit         Expands 2 port External Internal for your system         High Speed Transfer Rate up to 5Gbs         Design to meet PCI Express 2.0 Gen 1 compliant         Compliant with Universal Serial Bus 3.0 Specification Revision 1.0         Compliant with xHCI(eXtensible Host Controller Interface) Specifications Revision 0.96         Supports simultaneous operation of multiple USB 3.0, USB 2.0, and USB 1.1 devices         Supports USB Data transfer rate of 1.5/12/480/5000 Mbps         Expands 2 port External USB3.0 Super-Speed Port for your Desktop system         Each USB port output power up to 5V 900ma for USB device         Hot Swap feature allow you to connect/disconnect devices         Microsoft WHQL approve         Supports Driver for Microsoft Windows