Hamilton is a stylish crafted aluminium hub that is designed to connect with your device beautifully. It adds 3 superspeed 3.0 ports to your ultrabook or macbook AIR. No more short of USB ports and starts to connect more... The Gigabit LAN function offers you instant access to fast Internet service where wireless networking is not applicable. SPECS_ USB Port_ USB 3.0 LAN_ 10/100/1000Mbps RJ45 USB LAN Compatibility_ Backward compatible with USB 2.0 Material_ Aluminium + plastic design Support OS_ Windows XP / Vista / Win7 / Win8 / Win 8.1 or Mac OS 10.X and above. LAN Function_ Requires driver installation on Windows. Product Size_ 9.6 x 3.5 x 2.3 cm Product Weight_ 62.5g Package Size_ 12 x 16.2 x 2.5 cm Package Weight_ 112.5g