Ricoh SP C231N, Laser, Colour, 2400 x 600 DPI, A4, 21 ppm, Duplex printing Ricoh SP C231N. Print technology: Laser, Colour, Maximum resolution: 2400 x 600 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 21 ppm, Duplex printing. Network ready