1 Full compliant with the Universal Serial Bus Specification version1.1/2.0,full speed up to 480Mbps. 2 USB bus powered, no external power adapter. 3 Single chip integrated USB hub controller with embedded proprietary precessor. 4 Support Win 95 OSR2/98/98se/Me/2000/xp, Linux/Mac OS 5 Design with super streamline & mini size