1. This product can solve the lack of PCI-E interface on the motherboard, and this product can be expanded to 2 PCI-E interfaces. 2. It adopts the golden finger plug-in design and directly connects to the PCI-E slot of the motherboard for reliable and stable operation. 3. This product uses PCI-E interface for direct power supply, no external power supply is required. 4. Equipped with 2-port USB3.0, backward compatible with USB2.0 and USB1.1, and support the hot plug function of USB devices 5. As long as the motherboard has a PCI Express X4/X8/X16 slot, it can be easily expanded, plug and play, convenient and fast. Product name: PCI-E to 2-port USB3.0 expansion card Number of interfaces: USB3.0x2 Applicable slots: PCI-E X4/X8/X16 Bus bandwidth: about 6Gb/S Applicable system: Windows xp/Win7/Win8/Win8.1Win10, etc. Working environment: 0 Celsius-70 Celsius Colour:blue Material:PCB+metal Size:120 x 68.8 x 57mm Package Contents: 1 x PCIE expansion card Only the above package content, other products are not included. Note: Light reflection 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.