OKI Okipage 20n Duplex Laser Printer. Maximum resolution: 600 x 600 DPI. Print speed (black, normal quality, A4/US Letter): 20 ppm. Maximum ISO A-series paper size: A4, Maximum print size: A4 (210 x 297 mm). Internal memory: 8 MB. Dimensions (WxDxH): 331 x 366 x 462 mm