Product Features 55" screen measured diagonally from corner to corner:For optimal viewing in large rooms. Ultraslim design (1-5/8" deep):Ideal for wall mounting (with optional mounting kit, not included). VESA compatible (400mm x 400mm). 120Hz refresh rate:Along with a 6.5 ms response time reduces blurring and streaking during fast-action scenes. 4000:1 contrast ratio (40,000:1 dynamic):For an arresting viewing experience. High brightness (380 cd/m²):Delivers brilliant colors. 1080p display:Provides the highest quality progressive-scan picture possible from a high-definition source. Two 10W speakers:With SRS TruSurround HD provide a lush soundscape. Inputs:Include 3 HDMI (1 side, 2 rear), 1 PC audio (rear), 1 PC (rear) and 1 composite/component (side). Outputs:Include 1 analog audio (rear), 1 optical digital audio (rear) and 1 headphone (side). 3 HDMI inputs:HDMI cable not included. High-speed HDMI cable is the only connection that can deliver a full HDTV experience with a full 1080p picture and digital surround sound. PC video input:Lets you connect your computer to experience high-resolution images. USB 2.0 port:For quick connection of a digital camera or other USB device. 178° horizontal and vertical viewing angles:For easy viewing. Additional useful features:Include channel labeling and sleep timer.