Lexmark C534dn Colour Laser Duplex, Network. Maximum resolution: 1200 x 1200 DPI, Print technology: Laser, Maximum duty cycle: 100000 pages per month. Print speed (black, normal quality, A4/US Letter): 22 ppm, Print speed (colour, normal quality, A4/US Letter): 21, 22 ppm, Time to first page (black, normal): 11 s. Internal memory: 256 MB, Maximum internal memory: 768 MB. Processor clock speed: 625 MHz. Standard input capacity: 350 sheets, Maximum input capacity: 900 sheets