Ultra - U12-40740 - Aluminus USB 3.0 Hub - 4 Port, USB 3.0 5Gbps, Aluminum 4 Ports Transfer Speed up to 5Gbps on USB 3.0 Compatible with USB Specification Rev 1.0&#44; 1.1 and 2.0 Interface - Downstream - USB 3.0 AF &#40;4&#41;&#44; Upstream - USB 3.0 Micro-B &#40;1&#41; Material - Aluminum