Features: Brand new and high quality Self-Powered: Easily add 2 USB 3.1 Type-C ports to your PCIe-enabled desktop computer with the PCI Express to USB 3.1 Controller Adapter. Each interface has an individual 3A power supply, 2 interfaces work independently, totaling 6A. No extra power cable is required. Note: It is not for LINUX and Mac OS. High Speed: Uses for NEC main control chip, to achieve USB 3.1 Max 10Gbps transfer speed, 2 USB C ports can work simultaneously. for USB2.0. Full Protection: Each interface has a separate insurance, with overcurrent and short-circuit protection. Protect your devices and your computer. Stable and Faster: 2 conductive polymer capacitors to ensure more stable power supply to each interface. Enjoy copying movies, data files, music, and photos between USB devices and your computer at a faster speed. Wide Compatibility: Supports PCIE X1 / X4 / X8 / x16 slot. This USB-C card offers plug & play simplicity in for Windows 10, 8.1, 8 (32/64bit) and for Windows Server 2012, 2012R2, 2016, 2019, for Windows 7, XP, Vista, and older systems, the card comes with a mini-CD with the necessary drivers. Specifications: Output Interface: 2 x USB-C 3.1 Input Interface: PCI-E for PCI-E X1 X4 X8 X16 Transfer Speed: USB 3.1 10Gbps, USB 2.0 480Mbps Compatible OS: for Windows 10 / 8.1 / 8/7 / XP 64-bit and 32-bit Size: approx. 120x80x58mm/4.72x3.15x2.28in Note: WIN8 and WIN10 users do not need to install a driver. For XP and WIN7 users, it is necessary to download, disconnect, and install the driver. (1. If your system is WINXP or WIN7, it supports the installation content called drivers V805 R30230.EXE on the CD.) It does not support old PCI. It is not for Mac OS. It does not support LINUX. Package Includes: 1PC x 2 Port PCI-E to USB 3.1 Expansion Card