While the leaflet that comes with the hub tells you what the hub does, it does not tell you how to set it up! However, in less than a minute you can be up and running. Plug an ethernet cable into a spare connection on your modem/router and the other end of the cable into ethernet connection number 8 on your hub. Then plug in the end of the lead from the supplied transformer into the only hole it will fit into and plug the transformer into the mains. It works! It will not work without the mains connection however, don't be tempted to do without it. Excellent value for money and an extra seven ethernet connections to play with!