The "Lex" here is shorthand for Lexmark, and the CX635adwe is a colour laser multifunction printer from Lexmark's business CX series — the "adwe" suffix in Lexmark's naming typically denotes automatic duplex printing plus wireless and Ethernet connectivity built in, so it's designed to sit on a shared office network without needing extra add-on cards. As an MFP it covers at minimum print, copy and scan from one unit, with fax commonly included on printers in this model tier, though this listing doesn't itemise the full function list or rated page-per-minute speed, so those should be confirmed against Lexmark's spec sheet if they're a deciding factor. Positioned as a networked colour workhorse for a small-to-medium office rather than a home printer.