The HP LaserJet Enterprise M604n monitor jobs and settings quickly with the 4-line display and use the 10-key pad for PIN printing. Meet high-volume demands. Add automatic two-sided printing and versatile paper trays—up to 3600 sheets.4 Improve efficiency. Add paper-handling accessories to presort jobs, print on different media, and more.5 Extend your printing reach. Easily share printing resources on a network with Ethernet connectivity. Easily print from a variety of smartphones and tablets—generally no setup or apps required. Protect sensitive data—at rest or in transit—with a variety of embedded and optional security solutions. Save energy—HP Auto-On/Auto-Off Technology turns your printer on when you need it and off when you don’t