It's a drawing of a computer monitor or T.V. with a double ended arrow drawn inside of the screen. The arrow is pointing to the top right of the screen and to the bottom left of the screen as if to indicated the diagonal size of the screen.
Related to Widescreen Icon
Related icons are the icons with matching tags, as well as all household icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors