This document is the user manual for VIZIO M3d420SR / M3d421SR / M3d460SR / M3d550SR, describing the features and characteristics of the product. It features THEATER 3D™ LCD HDTV and Vizio inTERnET Apps™, and meets the ENERGY STAR energy efficiency standard. Additionally, the product is certified by Dolby, HDMI, SRS StudioSound HD, and RealD 3D.