"Most USB TV tuners -- used primarily for laptops, because desktops can get TV tuner cards that plug directly into the motherboard -- are capable of grabbing standard definition television only. Such is not the case here. The Pinnacle PCTV HD Stick actually allows you to grab a free HDTV feed out of the air using the tiny antenna included in the package. Yes, HDTV for free and it's 100% legal. If you happen to find yourself at home, you can connect this TV tuner to the outlet in your wall as well, receiving all the channels that you normally would through a conventional cable or satellite set top box. It basically transforms your computer into a TV through a coaxial cable."