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 Brother HL-T4000DW, Colour, 4200 x 1200 DPI, 4, A3, 30000 pages per month, Duplex printing Brother HL-T4000DW. Colour, Number of print cartridges: 4, Maximum duty cycle: 30000 pages per month. Maximum resolution: 4200 x 1200 DPI. Maximum ISO A-series paper size: A3. Duplex printing. Display: TFT. Wi-Fi. Product colour: Black