Acer UM.IV6AA.A02 20-Inch Screen LCD Monitor Display Type: Widescreen LCD w/ White LED Backlight Display Area: 20" (19.5" Viewable) Max/Native Resolution: 1600 x 900 Interface: 1x VGA Port, 1x DVI Port Display Type: Widescreen LCD with White LED Backlight Display Area: 20" (19.5" Viewable) Max/Native Resolution: 1600 x 900 Interface: 1x VGA Port, 1x DVI Port The Digital Visual interface(DVI) is used to connect a video source, such as a display controller to a display device, such as a Computer monitor.