D 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. D EIZO FlexScan EV2456, 61 cm (24"), 1920 x 1200 pixels EIZO FlexScan EV2456. Display diagonal: 61 cm (24"), Display resolution: 1920 x 1200 pixels, Native aspect ratio: 16:10 https://uk.hardware.info/reviews/7318/eizo-ev2456-review-classic-format-with-a-new-look The majority of monitors have a 16:9 aspect ratio. However there are still a relatively small, but significant amount of monitors out there on the market with a 16:10 aspect ratio. These are mainly aimed at the business market, however there are also some... Eizo has basically delivered the perfect office monitor with the EV2456: it doesn't take up a lot of space, it's exceptionally ergonomic, easy to configure by both system admins and users, it comes with all the connectivity you'd want and what's more, it...