features1‎.‎ Adds 4 Usb 2.0 Hi‎-speed Ports‎.‎2‎.‎ Fully Compliant With Usb 2.0 Specification‎.‎3‎.‎ Supports Up To 127 Hi‎-speed Devices‎.‎4‎.‎ Backwards Compatible With Usb1.1‎.‎5‎.‎ Support Data Transfer Rate At 1.5/12/480 Mbps‎.‎6‎.‎ Individual Port Over‎-current Protection‎.‎7‎.‎ Friendly & Ergonomic Design‎,‎ Easily Portable‎.‎8‎.‎ Provide Up To 500ma Per Port Sufficient For Diverse Devices‎.‎9‎.‎ Plug & Play Installation‎.‎10‎.‎ Support Windows 98‎,‎ Windows 2000‎.‎windows Me‎,‎ Windows Xp‎.‎11‎.‎ Support Os 8.6 Or Above‎.‎12‎.‎ Hi‎-speed Downstream Ports With Usb A Female Connectors‎.‎13‎.‎ Hi‎-speed Up Stream Port With Mini Usb 5pin Jack‎.‎