Samsung ML-2850D Mono Laser Printer, Laser, 1200 x 1200 DPI, A4, 28 ppm, Duplex printing Samsung ML-2850D Mono Laser Printer. Print technology: Laser. Number of print cartridges: 1. Maximum resolution: 1200 x 1200 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 28 ppm, Duplex printing