The Lexmark X850E is a high-end, multi-function monochrome laser printing unit. It is meant for business or office use and can print up to 35 pages per minute. It also has a built-in scanner, photocopy function and fax machine. It has a 625MHz processor and 256MB of RAM, expandable up to 768MB, and can handle very large print jobs. Its maximum input capacity is 5100 pages, and it has built-in finishing options like stapling and hole punching. It has security features like SNMP v3, SecIP, 802.1x authorization and SSL. It is also supposed to be easy to use, with a large 8" touchscreen operator panel, and customizable printing options like custom job emailing, copying and previews of scans. It can also print on wide-format A3 paper, as well as email jobs or save them directly to USB memory.