Monochrome Laser Duplex (2-sided) Printing: Integrated Duplex Print Speed: Up to 38 ppm Recommended Monthly Page Volume: 500 - 5000 pages Print more, stop lessOptional High Yield Unisontoner provides up to 15,000 pages of output, whilst an optional paper tray increases total input capacity by up to 900 sheets for more printing and less downtime. And with its steel frame and lifetime fuser, the MX331adn is built to last.Solid performance, flexible connectivityPower through challenging jobs with output of up to 38 pages per minute* and automatic single-sided scanning at up to 46 images per minute. Connect via USB or Ethernet to give your whole team access.Full-spectrum securityLexmark's comprehensive approach to product security is a design and engineering mandate across our entire product portfolio. Our security features help to keep your information safe - in the document, on the device, over the network and at all points in between.Interact with easeTake command of printing, copying