ETvalley Premium 7 Port Aluminum USB Hubs 2.0 with Double Line, Silver, 6.18x1.45x0.86 inches 7 Ports (output); 2 Ports (input) Size: 618.1*145.7*86.6 inches Up to 480 Mbps data transfer rate Support USB2.0 and USB1.1 Compatible with Windows 98, Windows 98SE, Windows 2000, Windows ME , Windows XPVista and Mac OS 10.1