Box Content - WinTV-HVR-850 USB 2.0 TV stick with cable TV or ATSC antenna connection, USB extension cable, Software on CD-ROM, and Quick Installation Guide : Watch and record high-definition ATSC digital TV or cable TV on your PC or laptop : Watch and record cable TV or over-the-air ATSC high definition digital TV programs, in a window or full screen on your PC or laptop monitor : Analog cable TV tuner built-in, will also work with TV antenna : Record analog TV shows to your PC"s hard disk using our SoftPVR MPEG-2 encoder : Analog TV recordings will typically consume 1.5GB of disk space per hour : System Requirements - 2.2-GHz Intel P4 or 1.8-GHz Centrino or equivalent, 2.8-GHz Intel P4 or Core Duo or equivalent for analog TV recording with MPEG-2, Microsoft Windows Vista or XP with Service Pack 2, Graphics with 64MB of memory, USB 2.0 port, and CD-ROM drive for Software installation