G 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. G Philips 559M1RYV/00, 55", 3840 x 2160 pixels, 4K Ultra HD, LED, 4 ms, Black Philips 559M1RYV/00. Display diagonal: 55", Display resolution: 3840 x 2160 pixels, HD type: 4K Ultra 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.monitornerds.com/philips-559m1ryv-review/ on AmazonThe Philips 559M1RYV is a massive gaming monitor that's designed for immersive and impressive gaming or entertainment experience. It's the 558M1RY's upgraded sibling so it now includes features that make it ideal for next-gen devices which c... Large and Crisp 4K Screen, USB-C and HDMI 2.1 Included, Attractive Design and Features, FreeSync and G-Sync Compatible, Expensive, Weak Overdrive, Prone to Blooming The Philips 559M1RYV is a fantastic monitor for immersive gaming on PC and next-gen consoles. It is capable of great imagery and HDR performance even if it's not comparable to some HDR 1000 monitors with FALD units in the market. It is designed to accommo... https://www.tomshardware.com/reviews/phillips-momentum-559m1ryv-review The Philips Momentum 559M1RYV is a beast, both in size and features. Its 55-inch 4K (or UHD) VA panel sports a 144Hz refresh rate, Adaptive-Sync, HDR, extended color and a 1200-nit full-array backlight. It also includes a slick bias light feature and, a... Bright, sharp picture & broad contrast, Vivid, accurate color with excellent HDR, Versatile Ambiglow bias light feature, Class-leading audio quality, Solid build, Mediocre overdrive, No ULMB backlight strobe Philips' Momentum 559M1RYV delivers an excellent jumbo-screen experience for gaming and entertainment. Its only flaw is a weak overdrive, but with a vivid picture, accurate color, killer HDR, top-quality sound and Ambiglow, it has some worthwhile advantag...