Features: brand new and high quality This 4-port usb pci-e card supports usb 3.0 which can provide fast data transmission speed, and it is powered by pci-e interface, stable and secure. The pci-e extender card for usb features a pci-e x1 bus interface, you can connect it with 4x, 8x, 16x/graphic card interface. The pci-e riser card for usb features simple installation and is designed with a led indicator light so you can easily know the status of the job. The pci-e x1 to usb adapter is easy to use and can be used on many types of computer operating system. The pci-e to usb adapter can provide 4 usb pci-e ports, so you will have more ports to connect. Specifications: Bus interface: PCI-E x 1.(for 4x, 8x, 16x/graphic card interface) Interface: PCI-E x4 usb interface. Size: approx. 120x68x58mm/4.72x2.68x2.28in Compatible system: replacement for dos, replacement for linux, replacement for winxp/win7/win8/win10. Package Includes: 1x PCI-E Riser Card note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!