Features: Can be used in many kinds of computer operating system: The PCI-E to USB Extender Card can be used in many kinds of computer operating system, and it is easy to install and remove. LED light: The PCI-E 1 to 4 adapter has an LED light that makes it more convenient to check the working status of the board. 4 USB ports: The PCI-E to USB adapter has 4 USB ports that can connect to 4 PCI-E riser boards and is convenient to use. Specifications: Bus interface: PCI-E x 1(for 4x, 8x, 16x/graphic card interface) Interface: PCI-E USB3.0 interface Size: approx. 120x68x58mm/4.72x2.68x2.28in Compatible System: for WINXP, WIN7, WIN8, WIN10, LINUX DOS Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from actual item. Package includes: 1PC x PCI-E Riser Card