- rotate USB socket design for convenient portability. - Expand one USB port to four ports, every port can supply 500mA current (total max.). - USB1.1 spec, high-speed transfer rates 12Mbps.- USB bus powered, no external power adapter.- Driverless, plug and play. - With one power LED.- Support Win 95 OSR2/98/98se/Me/2000/xp, Linux/Mac OS

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