Specifications 1. Fully compliant Single-lane(x1) PCI Express 2.0 2. Speed up to 5.0Gbps 3. Compatible with USB 2.0 USB 1.1 4. For Windows 2000 XP win 7 PCI-Express card adapter 2 ports USB 3.0 chipset NEC720202 (1). Main Features: 1. Compatible with USB 2.0 and USB 1.1 devices 2. Supports simultaneous operation of multiple USB 3.0 and USB 2.0 devices 3. Extend 2 external USB3.0 super speed system interface terminals 4. For Windows 7 / Window 8 / Vista / XP 32/64-bit Server 2003-2008 32/64-bit 5. Bus-powered mode and no external power required for most of peripherals 6. Power connector available for high current consumption peripherals 7. 2 external 5Gbps Super Speed USB 3.0 Ports 8. Max. data transfer rate up to 5.0Gbps. (A speed is 10 times faster than USB 2.0) 9. Fully compliant with Single-lane(x1) PCI Express 2.0 specification 10. 4 pin connector supports extra power no external power is needed 11. Fully Plug & Play and Hot Swap Compatible connect/disconnect devices without powering down the system 12.*System Requirement: PCI-E Slot (Not fit in a standard PCI slot only PCIe) 13. Gain CE FCC RoHS WHQL certificates. 14. Warranty: please contact us for replace anytime if any problem for card adapter except man-made damage or Natural Disaster. (3) System Requirement For System Windows 2003 / XP / Vista / 7 (32 bits/64bits) Win 7 and Win 8