Our take
Lexmark maps the MS331dn to part 29S0000 and lists it as a monochrome laser print-only printer. The product specification rates output up to 40 pages per minute on Letter paper, with automatic duplex and 350 sheets of standard input. USB and Ethernet are documented, while wireless is explicitly listed as unavailable. Lexmark recommends 500–5,000 pages per month. That range can help a small team compare routine workload without confusing recommended volume with maximum duty cycle. Choose it for wired mono output, not multifunction or wireless access.
A small office wanting a wired mono printer with automatic duplex and a documented moderate recommended workload..
Choose another model if you need color, copying or scanning, built-in Wi-Fi, or a low-volume workload below the published recommendation.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact model includes automatic duplex for unattended two-sided print jobs.
- Lexmark gives a recommended 500–5,000 page monthly range rather than only a maximum duty figure.
- USB and Ethernet allow local use or a wired office connection.
What to weigh up
- The MS331dn is print-only and monochrome, so it cannot replace an MFP or color printer.
- Lexmark explicitly lists wireless as unavailable on the exact model.
- Its recommendation starts at 500 pages per month, which may exceed an occasional-use routine.
Specifications and exact model details
The key details
| Model covered | MS331dn |
|---|---|
| Main functions | Monochrome laser print-only model |
| Print output | Up to 40 ppm Letter; 350-sheet standard input |
| Two-sided printing | Automatic duplex; USB and Ethernet; 500–5,000 pages/month recommended |
Performance figures are manufacturer claims. Source checked October 14, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
What jobs does the MS331dn handle?
Lexmark identifies the MS331dn as a monochrome laser printer for print-only work. It cannot copy or scan originals, so choose it when a simple print queue is enough and those tasks are covered elsewhere. The 40 pages per minute Letter rating puts it above many personal printers on stated speed, but output rating alone does not predict every job. The part number 29S0000 ties the comparison to this exact configuration.
How does automatic duplex affect routine use?
Lexmark lists automatic duplex as a feature of the MS331dn. Two-sided reports or internal documents can be sent without manually turning and reinserting the stack, which saves handling when duplex jobs recur. This is a confirmed exact-model feature rather than a guess from the dn ending. If your office prints only occasional one-page forms, the convenience may matter less than printer price or other factors that are not evaluated here.
How much paper is available at the printer?
The product specification lists 350 sheets of standard input. That capacity can reduce refill frequency compared with a small personal tray, while remaining below printers designed around much larger departmental stocks. Optional expansion is not counted in the base profile. A paper tray describes what can be loaded at once, not how many pages Lexmark recommends in a month; use the separate workload range for that decision.
Which connections are supported?
Lexmark lists USB and Ethernet and explicitly marks wireless as unavailable for the exact MS331dn. Ethernet supports a wired shared setup and USB can connect locally. This makes the model a practical candidate where network cabling exists, but a poor fit for a room that requires built-in Wi-Fi. Do not transfer wireless support from a similarly named Lexmark model or an optional accessory listing unless it matches this exact part number.
What does its recommended volume mean?
Lexmark recommends 500 to 5,000 pages per month. This gives a broad range for comparing personal-to-small-team workloads, but it is not a guarantee of the condition or remaining life of a specific unit. Keep the recommendation distinct from any maximum duty-cycle figure. The purchase link searches MS331dn and part 29S0000 because no current exact ASIN was proven; check the offered label, tray and seller condition before purchase.
Compare for your needs
Choose a wireless model if cabling is unavailable, or a color multifunction device when scanning and copy tasks belong in the same workflow.
Find the undefined that fits you.
Tell us what matters. We’ll help you weigh the options.
Before you buy
Does the MS331dn include automatic duplex?
Yes. Lexmark lists integrated automatic duplex for the exact MS331dn model.
Can it connect over Wi-Fi?
No. Lexmark explicitly lists wireless networking as unavailable on this exact configuration.
What monthly range does Lexmark recommend?
Lexmark lists a recommended monthly page volume of 500 to 5,000 pages for the MS331dn.
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 and review basis
Sources & review basis
We use the linked product documentation for the features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Lexmark U.S. MS331dn specifications, part 29S0000 ↗ — checked October 14, 2026.
- Lexmark U.S. MS331dn exact part, speed, duplex, input, ports, wireless and recommended volume ↗ — checked October 14, 2026.
The decision
The MS331dn is a wired mono print-only option with automatic duplex, 350-sheet input and a documented 500–5,000 page recommendation.
Is it the right fit?
Check the exact model and today’s offers on Amazon.