Mediasonic HW-150PVR is a digital converter box which converts Over-The-Air ATSC digital broadcast to your analog TV. The built-in Media Player function allows user to play back video files via USB connection. It can also be used as additional TV tuner. If user encounter technical difficulty, please contact support@mediasonicusa.com Please Note: This product does NOT work with Cable Provider such as Comcast, DirecTV, DISH Network, Time Warner Cable, etc. In General, all encrypted signal will not work with this unit. 2 Year Warranty from Mediasonic Store