100% brand new and high quality PCI Express USB 3.0 2 Ports Front Panel with 4-Pin; 20 Pin Control Card Adapter Compliant with USB 3.0 specification Revision 1.0 Low profile bracket up to 5Gbps transferring speed Supports Windows Xp/Server 2003/Vista.Server 2008/Windows 7 Built in 4-pin molex power for better support on power hungry bus-powered devices USB 3.0 is backwards compatible with USB 1.0/1.1/2.0 devices Ideal connection for hard disk drives, digital cameras, scanners, printers, external CD/DVD/Blu-ray writers, flash memory drives and etc. 4-pin molex power Super-speed 5Gbps transfer rate Interface: 3.0 USB Fully Plug-N-Play and Hot Swap compatible Supports Windows XP/Server 2003/Vista/Server 2008/Windows 7 PCB Size:(LxW) 6.80x6.50cm/2.68"x2.56" (Approx.) Quantity:1Set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 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 Ports USB 3.0 Controller Card Adapter 1Pc x Driver CD