1. Round design, allow large size USB devices to be plug-in.2. Small and light weight, easy bring to travel around, with China union not only decoration but also bring lucky for you.3. 4 port USB hub allows you to ealily connect extemal devices including mice, keybord, flash dribes, printers, and other USB devices to your laptop or desktop computer.4. Fully compatible with USB 2.0 and 1.1 devices. Supports high-speed data transfer rate up to 480 Mbps.5. Work with USB bus power or extemal power adapter.6. Supports hot swapping and plug-and-play capabillity.System requirementsPentium based PC or Power PC based Macintosh with avaitable USV 2.0 port Mac/Windows OS with USB 2.0 Support.