Features: brand new and high quality Self-Powered: Add 2 USB 3.1 Type-C ports to your PCIe-enabled desktop easily with PCI for Express to USB 3.1 controller adapter. Each interface has an individual 3A power supply, 2 interfaces work independently of each other, a total of 6A. No additional power cord is required. Note: It is not for LINUX and for Mac OS. High speed:Adopts for NEC main control chip, to achieve USB 3.1 Max 10Gbps transmission speed, 2 USB C ports can work at the same for time. for USB2.0. Full Protection: Each interface has a separate insurance, with overcurrent and short circuit for protection. Protect your devices and your computer. Stable and Faster:2 conductive polymer material capacitors to ensure more stable power supply of each interface. Enjoy copying movies, data files, music and photos between USB devices and your computer at a faster speed. Wide compatibility:Support PCIE X1 / X4 / X8 / x16 slot. This USB-C card offers plug & for 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 Transmission 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 Package Includes: 1PC x 2 Port PCI-E to USB 3.1 Expansion Card 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.