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 2 paper trays 2 Color ink technology Y HP Business Inkjet 1100dtn, Color, 1200 x 1200 DPI, A4, 6250 pages per month, 7.5 ppm, Duplex printing HP Business Inkjet 1100dtn. Color, Maximum duty cycle: 6250 pages per month. Maximum resolution: 1200 x 1200 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 7.5 ppm. Duplex printing. Product color: Gray