HP Color LaserJet Pro M255dw, Print, Two-sided printing; Energy Efficient; Strong Security; Dualband Wi-Fi. Print technology: Laser, Colour. Number of print cartridges: 4, Maximum duty cycle: 40000 pages per month. Maximum resolution: 600 x 600 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 21 ppm, Duplex printing. Network ready, Wi-Fi. Product colour: White