E 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. E AOC 27B3CA2, 27", 1920 x 1080 pixels, Full HD, LED, 4 ms, Black AOC 27B3CA2. Display diagonal: 27", Display resolution: 1920 x 1080 pixels, HD type: Full HD, Display technology: LED, Response time: 4 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). Built-in USB hub. VESA mounting. Product color: Black https://www.techradar.com/pro/aoc-27b3ca2-review This review first appeared in issue 357 of PC Pro.We were hoping to review the AOC 27B3CF2 in this Labs, as you can buy it for a similar price to the 27B3CA2 and they're identical but for one factor: the stand. Where the version with A2 at the end has a l...