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.
This is the Widescreen icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.