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 戴尔 E2009W, 50.8 cm (20"), 1680 x 1050 像素, 5 毫秒, 黑色 戴尔 E2009W. 显示器尺寸（对角长）: 50.8 cm (20"), 显示器分辨率: 1680 x 1050 像素, 响应时间: 5 毫秒, 原机长宽比: 16:9, 视角，水平: 160°, 视角，垂直: 170°. VESA 安装支架. 产品色彩: 黑色