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 Sharp 43FJ2E, 43", 3840 x 2160 pixels, LED, Smart TV, Wi-Fi, Black Sharp 43FJ2E. Display diagonal: 43", Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra HD, Display technology: LED, Screen shape: Flat. Smart TV. Motion interpolation technology: AMR (Active Motion Rate) 400, Contrast ratio (typical): 1000000:1, Native aspect ratio: 16:9. Digital signal format system: DVB-C, DVB-S, DVB-S2, DVB-T, DVB-T2. Wi-Fi, Ethernet LAN. Product color: Black