Samsung SIR-T451 High Definition Terrestrial Tuner - Many large-screen TV models that are HDTV compatible do not usually include a TV tuner capable of receiving free HDTV broadcasts. This is the ATSC tuner that you need to do so. Samsung is the leader in manufacturing these external tuners and the SIR-T451 is their latest, replacing the popular SIR-T351. Award-winning Samsung technology easily tunes and decodes all 18 ATSC Table 3 broadcast formats. With the Samsung SIR-T451, you can view HDTV, SDTV, and listen to Dolby(R) Digital 2.0 stereo or Dolby(R) Digital 5.1 surround audio through your audio system. Samsung solves output worries with a wide selection of output options including 1080i, 720p or 480p/i DTV formats, and connection options including DVI (1), Component (1), Composite (1), Audio-Rt/Lt, Dolby(R) Digital Coaxial and Optical. Attractive styling and affordable pricing make the Samsung SIR-T451 a perfect solution. Unit Dimensions - 14-15/16 (W) x 3 (H) x 12-3/8 (D) inches / Weight - 7.5 lbs Note - Free HDTV broadcasts require this tuner and an extra HDTV antenna. Antenna is not included in the price of this tuner.