Laser technology Laser HP LaserJet 9040dn, Laser, 600 x 600 DPI, A3, 40 ppm, Duplex printing, Network ready HP LaserJet 9040dn. Print technology: Laser. Number of print cartridges: 1, Maximum duty cycle: 300000 pages per month. Maximum resolution: 600 x 600 DPI. Maximum ISO A-series paper size: A3. Print speed (black, normal quality, A4/US Letter): 40 ppm, Duplex printing. Display: LCD. Network ready. Product colour: Grey