With output up to?42?[40] pages per minute and a light, compact form factor, the Lexmark?MS431dn?provides fast, dependable performance. Connect via USB or?Gigabit?Ethernet and power through big jobs with a?1-GHz?multi-core processor, 256?MB of memory and?a 100-sheet?multipurpose feeder. Available?Extra?High Yield?Unison?toner?prints?up to 20,000 pages,?and optional 550-sheet tray supports?longer print runs and enhances?media flexibility.?A steel?frame?drives durability?and long-life reliability, while standard two-sided printing saves paper,?the lifetime fuser?minimizes maintenance, and Lexmark full-spectrum security helps protect your network and proprietary information.