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 Samsung QM50R, 50", LED, 3840 x 2160 pixels, Wi-Fi Samsung QM50R. Display diagonal: 50", Display technology: LED, Display resolution: 3840 x 2160 pixels, Display brightness: 500 cd/m², HD type: 4K Ultra HD. Wi-Fi. Operating system installed: Tizen 4.0. Product color: Black