Macally USB2.0 Mini Slim portable 4 port Hub. Data transfer rate: 480 Mbit/s. Weight: 40 g. Interface: USB 2.0/1.1, Type: External, Dimensions (WxDxH): 127 x 27.9 x 10.1 mm. Compatibility: PC / Mac, Compatible operating systems: MacOS 10.1 / MacOS 9.x Windows 98, Windows 2000, Windows ME Windows XP