Brand New and High Quality PCI Express USB 3.0 2-Port Front Panel with 4-Pin; 20-Pin Controller Card Adapter Complies with USB 3.0 Specification Revision 1.0 Low-profile bracket with up to 5 Gbps transfer speed Supports Windows XP/Server 2003/Vista.Server 2008/Windows 7 Built-in 4-pin Molex power connector for better support of power-hungry bus-powered devices USB 3.0 is backward compatible with USB 1.0/1.1/2.0 devices Ideal connection for hard drives, digital cameras, scanners, printers, external CD/DVD/Blu-ray burners, flash memory drives, etc. 4-pin power connector SuperSpeed transfer rate of 5 Gbps Interface: USB 3.0 Fully Plug-N-Play and Hot Swap compatible Supports Windows XP/Server 2003/Vista/Server 2008/Windows 7 PCB Size: (L x W) 6.80x6.50cm/2.68"x2.56" (approx.) Quantity: 1 Set Note: Please allow 0-1 cm error due to manual measurement. Please ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes (No Retail Package): 1Pc x PCI-Express 2 Port USB 3.0 Controller Card Adapter 1Pc x Driver CD