Model UB H300 Interface USB 2.0 Connectors Upstream Port -1BM / 1MINI 5PIN (M) Port Type Connector Downstream Port - 4A Type Connectors Interface Amount 4 Ports Tranfer Rate Up To 480Mbps Using Way Plug -N-Play And Hot Swappable Amount Of USB Devies To Chains Up 127 Power Source Bus / DC +5V/6V Powered Built-In Cable Management System Yes LED Indicator One power LED , Four Port Status LEDs USB Cable Length 120cm Working System Windows98SE / Windows ME / Windows2000 / Windows XP