Vizio’s E470VA 47" LCD HDTV delivers full 1080p HD picture quality and superior audio at an amazing value. This flat screen LCD HDTV features 120Hz refresh rate, SRS TruVolume and SRS TruSurround HD audio for advanced virtual surround sound, 50,000 to 1 Dynamic Contrast Ratio, and four HDMI ports to connect up to four HDMI devices to your TV. The E470VA also exceeds Energy Star 4.0 guidelines to reduce energy consumption and utilizes built-in ambient light sensing technology, which automatically adjusts backlight levels to the brightness of its surroundings.