Taking a look at the Sigma 7-port USB hub just reminds me of one thing - Toblerone chocolates. What makes this prism-shaped USB hub special is the inclusion of a magnetic surface that enables you to stick this hub onto steel surfaces with ease. Just in case you're working on an expensive mahogany wooden table, you can always use the supplied gel and affix it where you please. The 7-port USB hub comes with its own AC power adaptor that comes in handy when you have plenty of power intensive devices hooked up. This unique USB hub measures 125mm × 35.6mm × 33.3mm , weighs approximately 95g, and retails for $33.