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 imageFORMULA 2020U, 216 x 356 mm, 1200 x 1200 DPI, 24 bit, 40 sec/page, Flatbed & ADF scanner, Black Canon imageFORMULA 2020U. Maximum scan size: 216 x 356 mm, Optical scanning resolution: 1200 x 1200 DPI, Input colour depth: 24 bit. Scanner type: Flatbed & ADF scanner, Product colour: Black. Sensor type: CCD, Daily duty cycle (max): 1000 pages, Light source: CCFL. Auto document feeder (ADF) input capacity: 50 sheets. Maximum ISO A-series paper size: A4, ISO A-series sizes (A0...A9): A4 https://www.pcmag.com/article2/0,2817,2364942,00.asp The Canon imageFormula DR-2020U ($645 direct) looks like nothing so much as a neatly sawed off top section from a desktop laser MFP—a flatbed scanner, automatic document feeder (ADF), front panel buttons, and LCD for menu text, with no printer attached... Extraordinarily fast text recognition. Duplex scanning (both sides at once). Flatbed and automatic document feeder. Clunky software installation. E-mail button doesn't work as expected. The Canon imageFormula DR-2020U more than makes up for a few shortcomings in its setup with an impressive collection of features and performance. Buy it now...