Features: 1.High Speed: This PCIe to 2 port USB 3.0 expansion card will add 2 USB 3.0 ports to a desktop computer via a PCI Express(1X) slot. 2 SuperSpeed ??USB 3.0 ports will provide a maximum data transfer speed of 5Gbps for video, photos or files. Comes with a 20 pin connector. 2.Simple Installation: PCI Express x1 interface (also suitable for PCIE x1, x4, x8, x16 slots). Quick and easy installation, instantly speed up your desktop PC and enjoy copying large files. 3.Supported Systems: for Windows 10/8/8.1/7/Vista/XP/2000, for Windows Server 2012/2008/2003, for OS, for Linux and other mainstream systems. Compatible with USB3.0, backward compatible with USB20 and USB1.1. External USB3.0, 10 times faster than USB2. 4.High Quality Voltage Regulator Components: Built in A level voltage regulator components, strengthen the protection of power supply voltage stability, intelligent and fast, reduce power loss, and ensure high?speed and stable data transmission. External Power 4 pin connector for powering USB devices from PC power. No self powered function. 5.Versatile: It is an ideal choice for external storage devices, MP3 players, external DVD recorders, card readers, digital cameras, webcams, video devices, and all other USB devices. specification:Item Type: PCIE to Usb 3.0 Expansion Card Product Material: PCB Chip Used: VL805 PCI E Interface: PCI Express 1X Slot Applies To: PCI E X1, X4, X8, X16 Slots (Not Applicable For PCI Slot) Applicable Models: Conventional Desktop Interface: 2 x USB3.0, 1 x 20 Pin Connector Data Transfer Rate: Up To 5Gbps Supported Systems: for Windows 10/8/8.1/7/Vista/XP/2000, for Windows Server 2012/2008/2003, for OS, for Linux And Other Mainstream Systems PackageList:1 xPCIEto Usb 3.0 Expansion Card