Features: 1.Expansion Capabilities: Add two USB 3.1 Gen 2 type C (10 Gbps) ports to your new PC or old PCIe equipped desktop computer. 2.Fast Transfer Speed: The expansion card for Asmedia chipset is equipped with 10Gbps bandwidth, which guarantees fast data transfer speed, the true speed of a single port USB3.1. 3.Compatible Slots: PCI express 4X to USB 3.1 Gen 2 expansion card compatible with PCIe x4, PCIe x8, PCIe x16, not PCIe x1, PCIe x2, PCI. 4.Wide Compatibility: Type C expansion card supports for Windows,for Linux operating systems, is widely compatible, and is backward compatible with USB 3.0 and USB 2.0 devices. 5.PCI E to USB3.1: PCI expansion card can expand two more ports, USB C interface only contains data signal, not video signal. specification:Item Type: PCI Express 4X to USB 3.1 Gen 2 Expansion Card Product Material: PCB Chip Used:For Asmedia ASM1142,3142 PCIE: X4 (support X4 X8 X16 Slot, Cannot Be Used for X1 Slot) USB C: 2 Ports USB C 3.1, Backward Compatible with USB C3.0, USB C2.0 and USB C1.1 Transmission Rate: Support 10G,5G,480Mbps,12Mbps,1.5 Mbps Data Transmission Rate PackageList:1 xPCIExpress4XtoUSB3.1Gen2ExpansionCard 1 x Metal Baffle 1 x Screw