TOOGOO(R)Super Speed 2-Port USB 3.0 PCI-E PCI Express 19-pin USB3.0 15-pin SATA Connector Low Profile 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 Super Speed USB 3.0 ports. Colour: Black