Our take
The HP LaserJet Pro 400 M401dn is a monochrome network printer for an office that needs Ethernet, automatic duplex and a published 750–3,000 page recommended monthly range. Its print-only design keeps the role focused. Confirm the dn suffix, because the M401 family includes variants with different network and duplex equipment.
A wired small-office or workgroup desk needing dependable monochrome printing and automatic two-sided output..
Choose another model if you need wireless printing, copy or scan functions, fax, color output, or a duplex scanner.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- HP documents automatic duplex and Gigabit Ethernet for the exact M401dn.
- Its recommended monthly range is 750–3,000 pages, useful for workload comparison.
- The M401dn suffix identifies a distinct standard configuration rather than a generic M401 family.
What to weigh up
- The M401dn is a print-only monochrome printer without copy, scan or fax.
- Built-in Wi-Fi is not included in the documented standard configuration.
- Duplex output is slower than the printer's one-sided speed rating.
The key details
| Model covered | LaserJet Pro 400 M401dn |
|---|---|
| Main functions | Monochrome print only |
| Print output | Monochrome laser; up to 33 ppm Letter |
| Two-sided printing | Automatic duplex printing |
Performance figures are manufacturer claims. Source checked October 8, 2026. Regional models and included accessories can differ.
What the features mean for you
Do not confuse M401 suffixes
HP's U.S. product listing maps M401dn to CF278A#BGJ. The dn model is distinct from released M401n and M401dne variants, and their feature details should not be mixed. The exact product number and suffix are worth checking on any listing, because a family label can make a basic network model appear equivalent to a duplex version. HP's specifications identify this M401dn as a monochrome print-only printer with automatic duplex and wired Ethernet. This review uses those exact-model facts; it does not assume copy, scan or fax functions from another LaserJet Pro device.
Automatic two-sided printing for office documents
The M401dn includes automatic duplex printing, so the device handles page turning during two-sided jobs. HP rates the model up to 33 pages per minute on Letter paper; duplex jobs have a separate, slower rated pace in the product literature. This is useful for internal reports, handouts and routine forms where reducing manual reinsertion matters. It remains a printer, however, not a duplex scanner or copier. If the daily workflow involves digitizing both sides of originals or making copies, the M401dn will need another device alongside it.
Gigabit Ethernet suits a wired shared queue
HP documents Gigabit Ethernet for the M401dn, making a wired office connection the clearest shared setup. The standard model does not include built-in Wi-Fi, so a wireless-only installation should choose another confirmed model or separately validate an external print-sharing arrangement. Wired networking can place the printer on an office LAN, while USB offers direct attachment for a workstation. Connection choice does not guarantee performance across a network; setup still depends on the host environment and printer configuration. Match the physical port and network policy before selecting this printer for a shared workgroup.
Use the recommended range rather than a duty-cycle ceiling
HP lists a recommended monthly volume of 750 to 3,000 pages for the M401dn. That range is a useful guide for normal placement and is different from a maximum duty-cycle figure. A small office with regular black-and-white paperwork may fall within the stated guidance, while a team consistently printing well beyond it should compare a higher-volume workgroup device. The monthly recommendation does not guarantee an individual used printer's remaining life. Account for the actual print share, paper type and duplex work when estimating whether the model will be a good fit.
Paper output is focused and predictable
The M401dn is designed around monochrome printing rather than a broader document station. That can be a benefit when a nearby copier or scanner already serves the office and the print queue needs a dedicated wired device. HP's published speed and duplex capability give clear selection criteria without implying color, fax or other unlisted tasks. A buyer should verify the paper tray, output area and duplex path on a used machine, especially if it has been transported. The model's compact role is easiest to justify when the intended volume and network setup are already clear.
Check a refurbished unit as an individual purchase
HP's product data describes the model, not an individual M401dn's condition. Confirm the unit label and product number, inspect Ethernet and USB ports, and verify that automatic duplex works with a real two-sided job. Check toner status, tray movement and the condition of the fuser and paper path. Because this is a discontinued generation, buyers should verify current consumable and service options rather than assuming support from the specification. Price, stock, seller reputation, supply level and return terms vary by listing and are not stated here.
What else to compare
For copy, scan and fax with wired networking, compare the Dell E515dn; for a monochrome print-only model with built-in Wi-Fi and duplex, compare a current wireless printer such as the Brother HL-L5200DW.
Before you buy
Does the M401dn include an automatic duplexer?
Yes. HP's M401dn product information documents automatic two-sided printing as a standard feature of this exact variant.
Can I print to it over Wi-Fi?
The documented M401dn standard configuration has Gigabit Ethernet but no built-in wireless networking. Verify an external sharing solution separately if needed.
What is HP's recommended monthly volume?
HP lists 750 to 3,000 pages per month as the M401dn recommended range, separate from a maximum duty-cycle figure.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- HP LaserJet Pro 400 M401dn U.S. specifications ↗ — checked October 8, 2026.
- HP U.S. LaserJet Pro 400 M401dn specifications: duplex, network and monthly volume ↗ — checked October 8, 2026.
- HP U.S. M401dn product page and product number ↗ — checked October 8, 2026.
- HP-authored M401 series specification sheet ↗ — checked October 8, 2026.
The decision
The M401dn is a capable fit for a wired monochrome queue that values automatic duplex and a published workload range. Its print-only design and lack of built-in Wi-Fi make the feature boundary clear.
Is it the right fit?
Check the exact model and today’s offers on Amazon.