Sunshine-tipway Pci-e to USB 3.0 2 Port Express Card with 2 USB 3.0 Ports 20-pin Connector and 5v 4 Pin Power Connector (2 port usb 3.0) Extend with 2 USB 3.0 downstream ports and 1 USB3.0 19-pin Connector(can expand another two USB 3.0 ports) for standard desktop PC. Fully compliant with one-lane (x1) PCI Express 2.0 specification. TWO external 5Gbps SuperSpeed USB 3.0 ports. One 19-pin internal 5Gbps SuperSpeed USB 3.0 port. Built-in with 4-pin Power Super Speed USB 3.0 offers 10 times performance increase over Hi-Speed USB 2.0.