ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Videos and games come to life with less stutter or blur for more realistic play with smooth 5 milisecond gray-to-gray response time. 5 HP 2011x, 50.8 cm (20"), 1600 x 900 pixels, 5 ms, Black HP 2011x. Display diagonal: 50.8 cm (20"), Display resolution: 1600 x 900 pixels, Display surface: Matt, Response time: 5 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 170°, Viewing angle, vertical: 160°. Product colour: Black