LEXMARK MX521DE MONO MFP. MID-SIZE WORKGROUPS CAN WORK FAST AND STILL RUN ECONOMICALLY WITH THE MX521DE, THE UP-TO 46 PAGE-PER-MINUTE MULTIFUNCTION PRODUCT WITH LONG-LIFE COMPONENTS THAT RARELY NEED REPLACEMENT. A MULTI-CORE PROCESSOR JOINS 1 GB OF MEMORY TO POWER THROUGH BIG JOBS, WHILE A DURABLE DESIGN HELPS KEEP THINGS MOVING.