The Lexmark X646e is a versatile, convenient, and powerful machine that combines a Laser Printer, Copier, Scanner, and Fax with output speeds of up to 50 ppm. The Lexmark X646e is one step up from the X644e due to an included 21,000 page yield toner cartridge versus a 10,000 page yield cartridge.The Lexmark X646e features a large, vivid, 8 inch color touch screen that is both customizable and easy to view. Easily capture and send documents electronically with instant access to print, copy, fax and scan-to email functions from the convenient e-Task screen. The Lexmark X646e comes with standard 256MB RAM, expandable to 768MB, a fast 533 MHz processor and resolutions of up to 1200 x 1200 dpi. Enjoy better business application output with smart standard copy features and incredible paper handling options that support a wide array of media types. Whatever the task, the Lexmark X646e is a fully integrated multifunction printer that gets the job done.