The rotating cube design will take much more convenience in using. It adds four downstream USB 2.0 ports to your PC and notebook. Powered by USB from PC or notebook, it needs no other driver and supports full - speed 12 Mbps and low - speed 1.5 Mbps operations. Compatible with Microsoft Windows 98 / ME / 2000 / XP / vista and Mac 8.58 / 9.X.