The SuperStack II Baseline Dual Speed Hub is an easy-to-use, 10/100 autosensing Class II hub (repeater). It is ideal for users who want to connect both Ethernet and Fast Ethernet devices (workstations and other equipment) to the same hub. All ports on the Baseline Dual Speed Hub are half duplex, autosensing 10 Mbps and 100 Mbps. Each port senses the speed of the connected equipment and operates at the appropriate speed.