Dell E2221HN/E2421HN monitors feature an active matrix, thin-film transistor (TFT), liquid crystal display (LCD), and LED backlight. The features of this display include: E2221HN: The visible area of the display, measured diagonally, is 54.68 cm (21.5 inches). The resolution is 1920 x 1080, with full-screen support at lower resolutions. E2421HN: The visible area of the display, measured diagonally, is 60.47 cm (23.8 inches). The resolution is 1920 x 1080, with full-screen support at lower resolutions. E2221HN: Vertically and horizontally viewable, with viewing angles of 160 degrees (vertical) and 170 degrees (horizontal). E2421HN: Wide viewing angle (1 78 degrees), vertically and horizontally viewable. E2221HN/E2421HN: Dynamic Contrast Ratio (1,000:1) Supports digital connectivity with High-Definition Multimedia Interface (HDMI).