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 ASUS VP249QGR, 23.8", 1920 x 1080 pixels, Full HD, LED, 1 ms, Black ASUS VP249QGR. Display diagonal: 23.8", Display resolution: 1920 x 1080 pixels, HD type: Full HD, Display technology: LED, Response time: 1 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). VESA mounting. Product color: Black https://www.monitornerds.com/asus-vp249qgr-review/ on AmazonThe Asus VP249QGR is a super affordable 144Hz gaming monitor that uses a vibrant IPS panel instead of the TNs found on its predecessors. This model is one of the cheapest 144Hz offered by the brand, enabling the masses to enjoy competitive-lev... Very Low Price, Great Color Coverage, FreeSync/G-Sync Compatible, Low Input Lag, Compact and Lightweight, Tilt-Only Stand, Factory Calibration Needs Improvement, ELMB Locks Adaptive-Sync Features The Asus VP249QGR is an excellent choice if you want a responsive gaming monitor with decent image quality that will not destroy your wallet. This budget gaming display offers an excellent gaming experience in all the right places, such as its responsiven...