HP LaserJet Pro M501dn, Print, Two-sided printing. Print technology: Laser. Number of print cartridges: 2, Maximum duty cycle: 100000 pages per month. Maximum resolution: 4800 x 600 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 43 ppm, Duplex printing. Display: LCD. Network ready. Product colour: White