Epson AcuLaser C4100, Laser, Colour, A4, 24 ppm, Duplex printing, Grey, White Epson AcuLaser C4100. Print technology: Laser, Colour. Maximum duty cycle: 100000 pages per month. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 24 ppm, Duplex printing. Product colour: Grey, White