, which can scan both sides of a page simultaneously—a rarity for printers in its class. Key Performance Capabilities Rapid Output: Delivers the first page in as fast as with a top print speed of (Letter) or Dual-Head Scanning: The 50-sheet Automatic Document Feeder (ADF) supports simultaneous two-sided scanning , reaching speeds of up to (images per minute) for black and white. High-Volume Ready: Standard 600-sheet input capacity (expandable to 1,100 sheets ) and a recommended monthly volume of 2,000 to 6,000 pages Driver & Software Feature Highlights Official drivers and software are available through the HP Support Portal for Windows and macOS. HP LaserJet Pro MFP M521 Series Product Guide
Navigate to your printer properties and set "Two-Sided Printing" to automatic to save paper.