Lexmark MX511de Monochrome All-In One Laser Printer, Scan, Copy, Network Ready, Duplex Printing and Professional Features,,Multifunction laser printer delivers smoother workflows and faster speeds to help propel your business forward. Improve your print, scan and copy speeds by taking advantage of 512MB upgradable memory, 800MHz dual-core processor and Gigabit Ethernet. Print without a PC using the convenient USB port that lets you walk up, preview and print PDF and many other file formats. With built-in, two-sided printing and the ability to print on diverse materials, you can do more for your business and use less paper. Print 45 pages per minute with 1200 x 1200 dpi. Print or copy your first page in as little as 6.5 seconds. You can also authenticate, authorize and audit employee usage as well as protect sensitive data using standard network security protocols. The MX511de MFP also features a 4.3" color touch screen, copy Scaling from 25 to 400 percent, flatbed scanner, 8-1/2" x 14" maximum scan area, 250-sheet input tray and 100-sheet multipurpose feeder. Energy Star qualified.