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 QE55QN90AAT, 139,7 cm (55"), 3840 x 2160 Pixeles, QLED, Smart TV, Wi-Fi, Negre Samsung QE55QN90AAT. Pantalla diagonal: 139,7 cm (55"), Resolució de pantalla: 3840 x 2160 Pixeles, Tipus HD: 4K Ultra HD, Tecnologia de visualització: QLED, Forma de la pantalla: Plana. Smart TV. Relació d'aspecte nativa: 16:9. Sistema de format de senyal digital: DVB-C, DVB-S2, DVB-T2. Wi-Fi, Ethernet / connexió LAN. Color de producte: Negre https://www.cnet.com/news/best-55-inch-tv/ The best 55-inch TV for 2021 https://www.techradar.com/reviews/hands-on-samsung-qn90b-neo-qled-4k-tv-review Samsung's QN90B Neo QLED TV series is the second-tier 4K option in the company's QLED lineup, slotting in-between the flagship QN95B and QN85B series sets. And while we wouldn't call the QN90B series budget-friendly, it's priced significantly lower than t...