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 D420, Laser, Mono printing, 600 x 600 DPI, Mono copying, Mono scanning, A4 Canon imageCLASS D420. Print technology: Laser, Printing: Mono printing, Maximum resolution: 600 x 600 DPI. Copying: Mono copying, Maximum copy resolution: 600 x 600 DPI. Scanning: Mono scanning, Optical scanning resolution: 600 x 1200 DPI. Maximum ISO A-series paper size: A4