Features: brand new and high quality Bus interface Pcie 1X to 4USB PCI-E Card effectively solve the problem of insufficient PCI-E ports on the motherboard. Pcie 1X to 4 USB: Bus interface Pcie X1 - also for X4, X8, X16 interface). The 4-port USB PCI-E Card is designed with 4 USB ports that support USB 3.0, so it can provide fast data transmission speed. PCI-E slot power solution, no for extra power cable needed ,so that the main board power supply is not interfered by the outside world and has high stability. The PCI-E X1 to USB adapter is for many kinds of computer system and is easy to use,System support: Win7 / Win8 / Win10/ Win XP / DOS / Linux. Specifications: Bus interface: PCI-E x 1.(for 4x, 8x, 16x/graphic card interface) Interface: PCI-E x4 usb interface. Size: approx. 120x75x55mm/4.72x2.95x2.17in Color:black 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!