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 Canon imageCLASS D320, Laser, 600 x 600 DPI, Mono copying, A4 Canon imageCLASS D320. Print technology: Laser, Maximum resolution: 600 x 600 DPI. Copying: Mono copying, Maximum copy resolution: 1200 x 600 DPI. Maximum ISO A-series paper size: A4