10 Times Faster than High-Speed USB 2.0, Low Profile Supported, CImpies with PCI Express Base Specification Rev 2.0, Complies with USB 3.0 Specification Rev 1.0, Backward Compatible to USB 2.0 and PCI-Express 1.0. - Support USB 2.0 Mode Up to 480 Mbps - Support USB 3.0 Mode Up to 5 Gbps - Max. 5V/900mA Power Output to Each USB 3.0 Port - 4-Pin Power Connector (IDE Connector) to Extra Power - 2 (Two) External USB 3.0 Super Speed Ports - NEC PD720200F1 Controller Chipset - Data Transfer rate of 1.5/12/480/5000 Mbps - Support Windows Xp 32/64-bit, Vista 32/64-bit, 7 32/64-bit - Certified by CE, FCC, RoHS Dimension (WHD) (85 x 18.65 x 120.6) mm