VIZIO E550VL 55-inch Full HD 1080p 120Hz LCD HDTV (2010 Model) Exceeds Energy StarTM 4.0 guidelines SRS TruVolumeTM and SRS TruSurround HDTM audio 120Hz refresh rate 1080p Full HD 100,000 to 1 Dynamic Contrast Ratio 1080p Full HD 120Hz refresh rate 100,000 to 1 Dynamic Contrast Ratio SRS TruVolumeTM and SRS TruSurround HDTM audio Exceeds Energy StarTM 4.0 guidelines