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 Laser technology Laser HP LaserJet 4000, Laser, 1200 x 1200 DPI, A4, 17 ppm, Gray HP LaserJet 4000. Print technology: Laser. Number of print cartridges: 1, Maximum duty cycle: 65000 pages per month. Maximum resolution: 1200 x 1200 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 17 ppm. Product color: Gray