D 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. D Samsung HU8000F, 75", 4K Ultra HD, 3840 x 2160 pixels, LED, 16:9, Mega Contrast Samsung HU8000F. Display diagonal: 75", HD type: 4K Ultra HD, Display resolution: 3840 x 2160 pixels. Product color: Black, Panel mounting interface: 400 x 400 mm, Bezel type: 3 Bezel-less. Content management solution: Samsung LYNK Cloud, Samsung LYNK DRM. Consumer Electronics Control (CEC): Anynet+. RMS rated power: 20 W