Save time and improve productivity as the 540 MHz processor handles complex documents quickly. Get reliable, efficient sharing with Gigabit networking. Use a single driver, the HP Universal Print Driver communicates directly with each HP device on your network (To download the free HP Universal Print Driver Series for Windows, visit www.hp.com/go/upd). Upgrade your printer as business needs evolve with optional accessories, including additional 500-sheet trays (2nd 500-sheet paper tray is standard on HP LaserJet P4015tn and P4015x) or 1,500-sheet input tray, an automatic duplexer for two sided printing (Standard on HP LaserJet P4015x Cut paper consumption in half with optional automatic two-sided printing), an envelope feeder, a 5-bin mailbox, a stacker, or a stapler/stacker. Improve performance and increase storage capacity with an optional EIO hard disk. Choose the cartridge (HP LaserJet CC364A Black Print Cartridge 10,000 pages; HP LaserJet CC364X Black Print Cartridge - 24,000 pages) that best suits your needs: the HP LaserJet CC364X Black Print Cartridge delivers greater value per printed page for high volumes.