Print at equal speeds of up to 21-ppm for both full-color and black & white pages for maximum productivity—even when creating mixed documents. Minimize waiting with a fast first print speed of just 14 seconds. Seamlessly integrate these printers into your office with standard Windows and Macintosh compatibility with automatic PDL switching. Increase paper supply to 751 sheets without increasing footprint. The optional 500-Sheet Paper Feed Unit installs beneath the printer to expand capacity without occupying more space.