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 Color print/copy Colour printing Colour copying Colour scan Colour scanning Laser technology Laser HP LaserJet Enterprise CM4540, Laser, Color printing, 600 x 600 DPI, Color copying, Color scanning, A4 HP LaserJet Enterprise CM4540. Print technology: Laser, Printing: Color printing, Maximum resolution: 600 x 600 DPI, Print speed (color, normal quality, A4/US Letter): 40 ppm. Copying: Color copying, Maximum copy resolution: 600 x 600 DPI. Scanning: Color scanning, Optical scanning resolution: 600 x 600 DPI. Maximum ISO A-series paper size: A4