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 Brother HL-4050CDN, 320 MB, Color, 2400 x 600 DPI, A4, 20 ppm, Duplex printing, Network ready Brother HL-4050CDN, 320 MB. Color, Maximum resolution: 2400 x 600 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 20 ppm, Duplex printing. Network ready Brother's HL-4050CDN is a close relative of the HL-4040CN reviewed in What's New, Shopper 238. This version combines the same reasonable print costs and high speeds with the benefit of an automatic duplexer and an optional 500-sheet paper tray, which b... fast network printer with duplex capability: For some years the three giants in the printer arena have been Epson, Canon and Hewlett Packard (with a certain amount of competition from Xerox and Lexmark) but more recently Brother has launched a concerted a...