Usually u receive digital tv signals by using a set top box. With our Anysee USB tuners you can enjoy watching and recording digital television in SD and HD on your computer , laptop or HTPC using our convenient and easy to use software viewer, or by the popular Windows Media Center . Anysee USB receivers are supported on PC's with Windows XP Sp2 and up, Windows Vista and Windows 7 as operating system. We only provide tuners with the new cardreader PCB, which you can recognize by the letters NJ in the serial number of your device. All USB tuners are shipped with a full functional 20 day's trial of DVBLink and TV Source.