Monochrome Laser Duplex (2-sided) Printing: Integrated Duplex Print Speed: Up to 40 ppm Recommended Monthly Page Volume: 800 - 8,000 Pages Light, compact and fast, the MS431dn supports output of up to 40 pages per minute, multiple connectivity options and an optional 550-sheet paper tray.Print more, stop lessIn addition to a first page as fast as 5.9 seconds and output of up to 40 pages per minute, optional Extra High Yield Unisontoner provides up to 20,000 pages of output. Add an optional paper tray that increases total input capacity by up to 900 sheets for more printing and less downtime.Solid performance, flexible connectivityGet your first page as fast as 5.9 seconds, and power through challenging jobs with a 1-GHz dual-core processor and 256 MB of memory. 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 featur