Output quality and speed are the HP LaserJet Pro 400 Color Printer M451dn’s strong suits. If you need the Wi-Fi connectivity that it lacks, its otherwise identical cousin, the M451dw, is only ...

The HP LaserJet Pro 400 Color M451nw’s lack of an automatic duplexer is an issue that you can overcome by opting for the $500 M451dn (no Wi-Fi) or the $550 M451dw (with Wi-Fi and, despite the ...

As for print speed, the HP LaserJet Pro 400 MFP M425dn printed exactly according to HP claims. For testing, we sent a 35-page black-text document to the printer.

The $500 (as of April 2, 2012) HP LaserJet Pro 400 M451dn produces extremely nice output--including photos--and is very speedy for a model in this price range. It also has an automatic duplexer, a ...

The LaserJet Pro 400 MFP M425dn is the first multifunction monochrome laser printer to get the ePrint and AirPrint networking treatment.