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 Samsung Series 9 QE50QN90BAT, 50", 3840 x 2160 pixels, Neo QLED, Smart TV, Wi-Fi, Titanium Samsung Series 9 QE50QN90BAT. Display diagonal: 50", Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra HD, Display technology: Neo QLED, Screen shape: Flat. Smart TV. Motion interpolation technology: PQI (Picture Quality Index) 4500, Native aspect ratio: 16:9. Digital signal format system: DVB-C, DVB-S2, DVB-T2. Wi-Fi, Ethernet LAN. Product color: Titanium