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 Acer H213H bmd, 21.5", 1920 x 1080 pixels, HD, 5 ms, Black Acer H213H bmd. Display diagonal: 21.5", Display resolution: 1920 x 1080 pixels, HD type: HD, Response time: 5 ms, Native aspect ratio: 16:9, Viewing angle, horizontal: 170°, Viewing angle, vertical: 160°. Product color: Black