G means that the product is rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Regulation 2017/1369/EU. G DELL C8621QT, 2.17 m (85.6"), 3840 x 2160 pixels, 4K Ultra HD, LCD, 8 ms, Black DELL C8621QT. Display diagonal: 2.17 m (85.6"), Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra HD, Display technology: LCD, Response time: 8 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). Built-in USB hub, USB hub version: 3.2 Gen 1 (3.1 Gen 1). Product colour: Black