F 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. F LG 40WP95XP-W, 39.7", 5120 x 2160 pixels, UltraWide 5K HD, 5 ms, White LG 40WP95XP-W. Display diagonal: 39.7", Display resolution: 5120 x 2160 pixels, HD type: UltraWide 5K HD, Response time: 5 ms, Native aspect ratio: 21:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). VESA mounting, Height adjustment. Product color: White