Our take
The HP-hosted Samsung specification identifies the SL-M3870FW as a monochrome multifunction laser model with print, copy, scan and fax. It lists automatic duplex, built-in Wi-Fi, a 50-sheet ADF, a 250-sheet tray and a 50-sheet multipurpose feed. The recommended monthly range is 1,500–3,500 pages. The source presents speed in A4, so this review does not convert that rating to Letter. It also lists both 110–127 V and 220–240 V input ranges rather than resolving the historical candidate to a precise U.S. part. Confirm the exact label before connecting a particular unit.
An office wanting a mono fax MFP with an ADF, automatic duplex and Wi-Fi in the documented 1,500–3,500 monthly range, after confirming the offered unit's electrical variant..
Avoid it if the offered device's voltage cannot be confirmed, if Ethernet is essential, or if a higher monthly range or duplex scanning is required.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The source documents mono printing, copy, scan and fax in a single model.
- Automatic print duplex and a 50-sheet ADF support routine two-sided output and stacked originals.
- A 1,500–3,500-page monthly recommendation helps frame workload more clearly than speed alone.
What to weigh up
- The available specification lists multiple voltage ranges and does not map the candidate to one exact regional part.
- The reviewed packet does not establish Ethernet, so a wired-network requirement needs separate confirmation.
- The ADF's duplex-scan behavior is not established by the cited specification.
Specifications and exact model details
The key details
| Model covered | SL-M3870FW |
|---|---|
| Main functions | Monochrome print, copy, scan and fax |
| Print output | 250-sheet tray plus 50-sheet multipurpose feed |
| Two-sided printing | Automatic duplex; 50-sheet ADF |
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 does the all-in-one function set cover?
The exact-model support specification lists print, copy, scan and fax. That makes the SL-M3870FW a candidate for offices that need document capture and phone or service-based fax along with monochrome output. It avoids treating the ProXpress name as proof of a feature; the listed functions are tied to this model page. Users who only print may prefer a simpler device, while teams with color printing needs should choose a different engine because this configuration is monochrome.
What role do its feeder and trays play?
The page lists a 50-sheet ADF, a 250-sheet standard tray and a 50-sheet multipurpose feed. The ADF can help move a stack of originals through copy, scan or fax work; the source does not establish automatic two-sided scanning, so duplex originals may still need attention. The separate feed path offers room for occasional alternate supported media while ordinary paper stays loaded. Check what trays and feeder parts are actually present on the device being offered.
How do two-sided print jobs work?
Samsung's exact-model specification lists automatic duplex, so users do not need to flip the paper manually for supported two-sided output. That can reduce handling for internal reports and multi-page documents. It is a printing feature rather than proof of duplex scanning. If a team sends a high volume of double-sided originals through the ADF, ask for documentation on that scanning path before relying on this model as a one-pass intake solution.
Does its workload guidance match the office?
The product page gives a recommended monthly range of 1,500–3,500 pages. Compare that range with a representative month, including busy periods, rather than using a headline speed rating as a proxy for continuous capacity. The range is manufacturer guidance and not a measurement of every unit. The page expresses its speed in A4; keeping that unit avoids a misleading conversion when comparing regional specifications. A department regularly exceeding the range should look for a model with higher documented monthly guidance.
What should be checked about voltage and connectivity?
The specification lists both 110–127 V and 220–240 V inputs and does not resolve the candidate's exact regional part. For a U.S. installation, read the rating label on the offered machine and match it to the local supply before use. Built-in Wi-Fi is documented, but the saved source packet does not establish Ethernet, so do not assume a wired port from the family name. Confirm the ports and network setup on the exact unit before building an office workflow around it.
Who should consider this Samsung?
It suits a small or mid-sized monochrome office that uses copy, scan and fax, wants automatic print duplex, and can work within the 1,500–3,500-page monthly range. The ADF and multipurpose feed offer document flexibility without proving duplex scanning or a wired network interface. Its electrical variant is an additional check because the source covers multiple input ranges. Treat exact label, regional part, port condition and return terms as purchase-level questions; none is settled by a general support page.
Compare for your needs
Compare another mono MFP if Ethernet, confirmed U.S. voltage, higher monthly guidance or duplex document scanning is non-negotiable.
Find the undefined that fits you.
Tell us what matters. We’ll help you weigh the options.
Before you buy
Does the SL-M3870FW support Wi-Fi?
Yes. The exact-model support specification lists built-in Wi-Fi for the SL-M3870FW.
What monthly volume is recommended?
The source gives a recommended range of 1,500–3,500 pages per month for this model.
Can I assume every unit is configured for U.S. voltage?
No. The listed source covers 110–127 V and 220–240 V inputs; check the exact device label and part before use.
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.
- HP Samsung SL-M3870FW product specifications ↗ — checked October 14, 2026.
- HP-hosted Samsung SL-M3870FW specifications: functions, feeder, interfaces, monthly volume and voltage ↗ — checked October 14, 2026.
The decision
The SL-M3870FW combines a practical fax-and-scan workflow with Wi-Fi and automatic print duplex, subject to exact voltage confirmation.
Is it the right fit?
Check the exact model and today’s offers on Amazon.