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 Pro P1109, Laser, 600 x 600 DPI, A4, 18 ppm, White HP LaserJet Pro P1109. Print technology: Laser. Number of print cartridges: 1, Maximum duty cycle: 5000 pages per month. Maximum resolution: 600 x 600 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 18 ppm. Product colour: White