Plug and play installation.User-friendly and ergonomic design.Supports Windows 98, 98SE, 2000, ME,XP, Mac OS 9.x, 10.x.Over-current detection and protection.Fully compliant with USB 1.1 specifications,Backwardly compatible with USB 2.0.Supports up to 127 Full-speed or Low-speed .devices.Supports data transfer rate at 1.5/12Mbps.Adds 4 USB 1.1 Full-speed ports.System Requirements : OS support Windows, Mac 8.6 or above, Linux 2.2.7 or above; Driverless in Windows ME/2000/XP/2003, Mac(10.1.2 or above) Linux(2.4.x or above);
Driver in available in Win 98, Mac, Linux.