Screen size: This flat-panel LCD television has a 52 screen measured diagonally from corner to corner. This screen size is perfect for viewing from 6.5 to 12.8 away.Resolution: A 1080p resolution means that this television has 1080 rows of pixels vertically. The more pixels a TV has the clearer the images it can produce. The p stands for progressive scan which means the TV refreshes every row of pixels during each cycle to produce smoother motion and sharper picture than interlaced scan.NTSC tuner: A built-in NTSC tuner allows you to view standard analog television broadcasts through your television without a separate cable box.ATSC tuner: The ATSC tuner means that you can enjoy over-the-air digital channels and theater quality audio (with a separate HD antenna) without the need for a digital antenna.QAM tuner: The QAM tuner gives this TV the capability to receive free in-the-clear digital programming.Aspect ratio: A width to height pixel ratio of 16:9 means this TV has a widescreen aspect ratio which accurately recreates the dimensions in which HD programming and many feature films are shot.Contrast ratio: Contrast ratio describes the difference between the darkest blacks and brightest whites a television is capable of producing. Since there is no industry standard for how contrast ratio is measured it is only significant within a brand not between brands. This television has a contrast ratio of 2000:1.Inputs: Using the 3 available HDMI inputs you can experience high definition audio and video up to 1080p the highest possible resolution available. The 2 component video inputs can be used for video resolution up to 1080i. Also available are 1 S-video inputs 2 composite video inputs 1 PC input 1 DVI input and 1 RF input.Dolby Digital audio: Dolby Digital is surround sound technology that delivers high-quality digital audio for up to 5.1 channels. This produces a directional and more realistic effect.