3.0 that can provide a fast data transmission speed, and it is powered by PCI-E interface, stable and secure. extender card features a PCI-E X1 bus interface, you can connect it with 4x, 8x, 16x/graphic card interface riser card features a simple installation and is designed with a LED indicator light, so you can easily know the work status. adapter is easy to use and can be used in many kinds of computer OS. The PCI-E to USB, adapter can provide 4 PCI-E USB ports, so you will have more ports to connect. : Bus interface: PCI-E x 1.(Compatible with 4x, 8x, 16x/graphic card interface) Size: 120 x 68 x 58mm. Compatible system: Replacement for DOS, replacement for Linux, replacement for WinXP/Win7/Win8/Win10. Installation Instructions 1. The first step, when you use the adapter card, the computer needs to be turned off before they can connect the adapter card. 2. The Second step, connect to the motherboard's PCI-E slot. Use USB3.0 data cable adapter to connect the ends of the two USB port. Connect the power supply. 3. The third step: After completion of the above two steps, first in no hurry to insert your PCI-E card, start the computer to see if your computer has been identified to the riser card, if you not find the card, repeat the above operation. Colour:Photo Color Material:ABS Package Contents: 1 * Express Card Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.