The HP LaserJet Pro M501dn is a no-frills mono laser desktop printer built for small offices of 5-15 people that print between 1,500 and 6,000 mono pages a month. It runs at 45 ppm letter with auto-duplex, prints first page in 5.7 seconds, and is rated for a 100,000-page monthly duty cycle. Print resolution is 600 x 600 dpi native, with 4800 x 600 enhanced for fine lines — not the 1200 x 1200 native of the Enterprise M607/M610. Standard input is 650 sheets (100-sheet multipurpose plus 550-sheet main cassette); max climbs to 1,200 with the optional 550-sheet Tray 3. Output bin holds 250 sheets face down. Control panel is a 2-line LCD with numeric keypad — no touchscreen, no graphics display. Connectivity is Gigabit Ethernet plus USB 2.0; the USB port supports job storage with PIN release. AirPrint, Mopria, and HP ePrint are standard. Memory is 256 MB on a 1.5 GHz processor. The thing buyers regret: assuming this is the same as an Enterprise M607. It isn't — it's the Pro tier, simpler firmware, no Web Jetadmin enterprise security stack, no HP Wolf, no FutureSmart. Buy this when you want cheap, fast, mono, and reliable for a small office. Buy the Enterprise series when you need the security and management stack.