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 Laser technology Laser HP LaserJet Enterprise M604dn, Laser, 1200 x 1200 DPI, A4, 50 ppm, Duplex printing, Network ready HP LaserJet Enterprise M604dn. Print technology: Laser. Number of print cartridges: 2, Maximum duty cycle: 175000 pages per month. Maximum resolution: 1200 x 1200 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 50 ppm, Duplex printing. Display: LCD. Network ready. Product color: Gray