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 or X4 or X8 or x16 slot. This USB-C card offers plug and for play simplicity in for Windows 10,8.1,8 (32 or 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 or 8.1 or 8 or 7 or XP 64-bit and 32-bit Size: approx. 120x80x58mm or 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