Full specifications
Print speed black: Up to 21 pages per minute
Print speed color: Up to 21 pages per minute
Recommended monthly page volume: 750 to 2,000 pages
Print technology: Laser
Processor speed: 600 MHz
Print languages: HP PCL 6, HP PCL 5c, HP postscript level 3 emulation, PDF
Paper handling input, standard: 250-sheet input tray, 50-sheet multipurpose tray
Paper handling output, standard: 150-sheet output tray
Media sizes supported: Letter, legal, executive, 8.5 x 13 inches, 4 x 6 inches, 3 x 5 inches, 5 x 8 inches, envelopes (No 10, Monarch).


The HP LaserJet Pro 400 M451dn Network Color Laser Printer features print speeds of up to 21 ppm in both black and color. The printer's 600 dpi produces high quality prints right from your own computer and with the availability of high yield toner cartridges, reduces the cost of printing in house. The printer's internal 128 MB of memory handles complex print files without slowing down your computer, allowing you to continue working uninterrupted. Effortlessly reduce your paper consumption by up to 50% with the printer's automatic duplex printing. Additionally, the printer is designed for heavy use with its 40,000-page monthly duty cycle.
The printer features a 250-sheet input tray as well as a 50-page multipurpose tray. Keep 2 different paper types in the printer for easy switching between the 2 or use the same paper in both for longer uninterrupted print runs. An additional 250-sheet input tray can be added to the printer as your printing needs grow. The printer is compatible with a wide range of media including brochure, letterhead, photo, and rough paper as well as postcards, transparencies, labels, and envelopes.
The LaserJet features multiple connectivity options in addition to a USB interface. Easily share the printer with others on your wired network thanks to the printer's Ethernet connectivity. Worried about unauthorized usage? The printer comes with built-in security options to keep unauthorized users out and to protect your proprietary data. The printer is also compatible with ePrint which allows you to print any file or document by emailing it to the printer. When you set up the printer, a unique email address is assigned to your printer. Any time you want to print a file, simply email it to your printer's dedicated email address and it will be waiting for you in the printer's output tray.
Professional-Grade Speed & Color
Produce bold text and smooth color with HP ImageREt 3600 and 600x600dpi resolution
Boost productivity and save time with print speeds up to 21 ppm letter
Reduce your paper usage by up to 50% by taking advantage of automatic duplex printing
Manageability, Productivity, & Mobility
Share printing resources, using built-in Ethernet
Print from virtually anywhere with HP ePrint
Use AirPrint to print from compatible Apple devices
Proactively manage office printing with HP Web Jetadmin
Share printing resources, using built-in Ethernet
The printer handles complex files with ease without slowing down your computer thanks to it's built-in 128 MB of memory
Optimized for high volume printing with a 40,000-page maximum monthly duty cycle
Easy To Use & Resource-Conserving
Produce color marketing materials in-house on a range of media sizes by using tips and templates from HP
Print documents affordably. Get the same black cost per page as a black-and-white HP LaserJet printer
Reduce energy use with HP Auto-On/Auto-Off Technology. Also save with Instant-on Technology
Start right away with HP Smart Install
Receive consistent results with Original HP cartridges and easily reorder with HP SureSupply
Take advantage of free, easy recycling-cartridges returned through HP Planet Partners are recycled responsibly