The transfer rate of the USB 3.0 interface of this expansion card can reach 5 gbps, and it is backward compatible with USB 2.0 and 1.1.The USB interface can provide 5v2a power for external devices, and only two power modules are required, no additional power supply is required.Made of metal material, it is more durable and sturdy.It is suitable for Linux and for Windows XP/7/8/8.1/10 and 32-bit or 64-bit whql certified drivers. Moreover, it complies with PCI Express standard version 2.0 and meets the general standard of Serial Bus 3.0.Item Name: USB3.0 Expansion CardChip: NEC + VIASize: 12cm x 7.4cm/4.72 inch x 2.91 inch (Approx.)Notes:This is a pci-express card high-speed usb 3.0 interface expandable, when you need to use multiple external USB products at the same time, this Express card will be the best choice.Material:Metalcolour:BlackPackage Contents:1 * PCIE to USB3.0 7-port adapter card(NEC+VIA chip)Only the above package content, other products are not included.Note: Light shooting 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.