"The EX-12001-2 USB 3.1 PCIe (Gen3x2) card provides two external Super-speed+ USB 3.1 ports with a-socket. It has been developed to connect two additional USB 1.1, 2.0, 3.0 and 3.1 devices to your workstation, desktop or server. It supports USB 1.1 Low-speed (1.5Mbps), Full-speed (12Mpbs), USB 2.0 High-speed (480Mbps), USB 3.0 Super-speed (5Gbps) and USB 3.1 Super-speed+ (10Gbps). It is the perfect technology for external storage enclosures, digital cameras, webcam, scanners and more. The EX-12001-2 supports 900mA power on the external USB 3.1 ports. With the EX-12001-2, a low profile bracket is supplied for use with narrow housings up to a maximum height of 8cm.