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 Viewsonic VS18575, 86,4 cm (34"), 3440 x 1440 pixels Viewsonic VS18575. قطر صفحه نمایش: 86,4 cm (34"), رزولوشن صفحه نمایش: 3440 x 1440 pixels, Native aspect ratio: 21:9