Epson AcuLaser CX21NC, Laser, Colour printing, 2400 x 2400 DPI, Colour copying, Colour scanning, A4 Epson AcuLaser CX21NC. Print technology: Laser, Printing: Colour printing, Maximum resolution: 2400 x 2400 DPI, Print speed (colour, normal quality, A4/US Letter): 5 ppm. Copying: Colour copying, Maximum copy resolution: 600 x 600 DPI. Scanning: Colour scanning, Optical scanning resolution: 600 x 600 DPI. Faxing: Colour faxing. Maximum ISO A-series paper size: A4