Our take
The Brother RFAX2840 is a fax-centered monochrome laser machine that also works as a USB printer and copier. Brother's U.S. product page identifies the exact RFAX2840 and describes computer printing at up to 21 pages per minute, a 20-page automatic document feeder, a 250-sheet tray, and a 110–120 V power input. That gives it a useful role in a small office where faxing and copying remain part of the daily paper routine. It should not be mistaken for a modern network printer: the reviewed standard connection is Hi-Speed USB, and the page does not document Ethernet or Wi-Fi. It also does not establish a standard duplex path or a manufacturer-recommended monthly range. Those gaps matter if shared printing, automatic two-sided output, or a volume-based match is essential. Check the exact label, phone-line connection, feeder, paper path, toner and drum state, driver compatibility, and return terms on any offered unit. The Amazon destination is an exact-model search, not proof of a particular seller or ASIN.
A home office or small desk that needs a phone-line fax, basic copying, and occasional computer printing through USB..
It is not a fit when you need Wi-Fi, built-in Ethernet, an independently verified automatic duplex path, or a scanner that creates digital files.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Brother confirms fax and copy functions alongside computer printing over standard USB 2.0.
- The 20-page ADF and 250-sheet tray support multi-page fax and copy routines.
- Its 110–120 V specification is tied to Brother's U.S. product page.
What to weigh up
- Wireless and Ethernet are not listed among the standard connections for this exact model.
- The reviewed source does not establish automatic or manual duplex printing.
- A comparable recommended monthly print-volume range is not stated.
The key details
| Model covered | RFAX2840 |
|---|---|
| Main functions | Print, copy, and fax |
| Print output | Monochrome laser; up to 21 ppm |
| Two-sided printing | USB 2.0; duplex details are not confirmed |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
What the features mean for you
A fax machine that can print from a computer
Brother's page calls the RFAX2840 a laser fax and describes a USB 2.0 interface for computer printing at up to 21 ppm. That distinction is central to its fit: it can handle received faxes, copies, and direct print jobs, but it is not presented as a networked printer for several desks. Keep the phone connection and the USB printing connection separate in the setup plan, and confirm that the intended computer can use the available driver.
Paper handling for short office stacks
The manufacturer lists a 20-page ADF for faxing and copying and a 250-sheet paper tray. Those capacities make multi-page work more convenient than feeding each original individually, while keeping the device aimed at a modest footprint. Brother describes copying at up to 21 copies per minute, but that rating does not promise the same result for every document or used machine. Inspect the feeder rollers, tray guides, and output path before relying on those figures.
Copy and fax functions are its clearest strength
The RFAX2840 copies in black and white and includes a Super G3 fax modem with memory for incoming pages. The handset and telephone-line features make the machine a better match for a desk that still exchanges paper faxes than for an office that only needs print output. It does not replace a separate document scanner when searchable files or routine electronic capture are required. Confirm that faxing is truly part of the workflow before choosing this more specialized device.
A deliberately simple connection profile
Brother identifies Hi-Speed USB 2.0 as the computer printing interface and specifies U.S. power at 110–120 V AC. The reviewed page does not list built-in Ethernet or Wi-Fi, so those features should not be inferred from a bundle, an added adapter, or another Brother model. A direct USB connection is straightforward for one workstation, but shared access would need a separate supported setup. Confirm the port and the software path on the exact unit.
Duplex and workload guidance stay open
The reviewed product page does not establish a two-sided printing method or a recommended monthly page range for the RFAX2840. A duty-cycle or speed figure would not answer either question. If automatic duplex or a volume threshold changes the purchase decision, use a model whose source states that feature directly. For this finder profile, the missing figures remain unknown, rather than being filled from a neighboring fax model or a generic printer family.
Check a refurbished or older unit carefully
Brother's current product page identifies a refurbished RFAX2840, but that does not describe the condition of a separate offer. Check the phone jack, handset, feeder pickup, copy clarity, print path, drum and toner, and whether the device can connect to the intended computer. Ask about return coverage and test a representative page sequence when inspecting the offered unit. The tagged Amazon search helps locate exact-model listings; it makes no claim about availability, price, seller history, or the identity of an individual machine.
What else to compare
Choose a conventional network mono printer when multiple users need shared print queues. Choose a documented MFP with scan-to-file when paper capture is as important as fax and copying.
Before you buy
Can the RFAX2840 print from a computer?
Yes. Brother lists a Hi-Speed USB 2.0 connection and computer printing at up to 21 pages per minute.
Does the RFAX2840 include Wi-Fi or Ethernet?
Brother's reviewed standard-interface list names USB 2.0; built-in wireless and Ethernet are not established.
What duplex and monthly-volume figures should I use?
The reviewed exact-model source does not establish a duplex method or a recommended monthly print range.
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.
- Brother U.S. RFAX2840 product specifications ↗ — checked October 5, 2026.
- Brother U.S. RFAX2840 model, fax and copy functions, USB printing, speed, feeder, paper tray, and voltage ↗ — checked October 5, 2026.
- Brother IntelliFAX-2840 brochure for print speed, USB interface, and paper handling ↗ — checked October 5, 2026.
The decision
The RFAX2840 suits a small fax-and-copy workflow that also needs USB laser printing. Verify connections, paper handling, and the offered unit before relying on it.
Is it the right fit?
Check the exact model and today’s offers on Amazon.