This is Procurve 24 port 10/100 autosensing hub by Hewlett Packard. Unmanaged dual-speed hubs offer an easy, low-cost way to migrate from 10Mbps to 100Mbps networking. They are ideal for providing faster performance for users in workgroups with high bandwidth requirements, or for connecting workgroups with 10Mbps and 100Mbps users. ??This product features 24 RJ-45 autosensing 10/100Mbps ports, 10/100Mbps autosensing on every port no configuration required, easy expansion with MDI cascade port. Automatic polarity correction and auto partitioning on all ports help to find and fix common network problems. A built-in bridge connects 10Mbps and 100Mbps devices automatically, with nothing else to buy.