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).

Power consumption: 425 watts (Active), 15.2 watts (Ready), 4.0 watts (Sleep), 0.5 watts (Off)

Operating temperature range: 59° to 86° F

Operating humidity range: 10 to 80 percent RH (non-condensing)

What's in the box: HP LaserJet Pro 400 color M451dn Printer; four preinstalled introductory HP LaserJet toner cartridges (yield ~ 1,400 pages), built-in automatic duplexer for two-sided printing, Hardware Installation Guide, software drivers and documentation on CD-ROMs, power cord

Warranty: 3 month limited