It is a 7 port hub, which is exactly what it says it is but what it doesn't say is that the power cable is about 2 feet long. This doesn't really reach anywhere as far as it needs to, unless your PC is actually sat on your desk right next to your plug. The USB cable is a perfect length, but I wanted this to sit next to my monitor so I can easily plug in my UBS Pen Drives and my camera cable. It does work without the power supply but it doesn't run all my USB accessories as it not plugged into the mains. The only reason I'm not sending it back is that it isn't worth the effort and like I said it runs without a power supply, so most of my stuff will work. I think if I get another I will actually go to a shop and make sure I see how long the power cable is. Would be perfect if it had a longer power supply lead.