HP LaserJet Pro M521dn All-in-One Monochrome Printer
- 42 pages per minute, black and white
- 1200 x 1200 dpi copy resolution
- Print, copy, scan and fax in one body
- Automatic duplex two-sided printing
- Wi-Fi, Ethernet and USB 2.0 connections
- 8.5 x 14 inch maximum media size
Last refreshed Sep 23, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A busy small office gets a black and white laser that also handles faxing, with several ways to connect. It is mono only, and the listing leaves tray capacity unclear.
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ASIN: B00BBLG75YModel: M521dnCategory: Laser Printers
Overview
A small business owner who wants one machine for every paperwork task gets that here, in a monochrome HP LaserJet Pro. Duplex printing and a dual-head scanner that reads both sides in a single pass are the headline features, run from an LCD touchscreen.
Reach for this model when paperwork volume is steady and one shared device must cover every document task. The limitation is its mono output, and the sheet capacity fields in the listing do not describe real tray sizes, so check the tray before ordering a stack-heavy workflow.
Who it's for
Office teams that share one device for contracts, forms and scanned records are the intended users. People printing only occasionally, or those who need color, will find a simpler printer easier to live with.
Pros and cons
- Automatic two-sided printing
- Single-pass dual-head scanning
- Wi-Fi, Ethernet and USB connections
- Auto-On and Auto-Off energy features
- Mono output only
- Heavy for a desk
- Tray capacity fields look unreliable
Performance notes
Page output is set by the laser engine, while the scanner head reads both sides of a sheet in one trip through the feeder. HP Auto-On and Auto-Off technology powers the machine down when idle and wakes it for jobs. The touchscreen shortens the steps for copy and scan shortcuts.
Specifications
| Brand | HP |
|---|---|
| Model | M521dn |
| Dimensions & fit | |
| Maximum Media Size | 8.5 x 14 inch |
| Item weight | 52.7 pounds |
| Capacity & performance | |
| Printer Output Type | Monochrome |
| Wattage | 760 watts |
| Compatibility & installation | |
| Printer Connectivity Type | Wi-Fi |
| Hardware Interface | USB 2.0 |
| Compatible Cartridge | HP original cartridges for model A8P79A |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Resolution | 1200 x 1200 dpi |
| Additional Printer Functions | Print, copy, scan, fax |
| Duplex | Yes |
| Scanner Type | Document |
| Printer Type | Laser |
| Display Type | LCD |
| Total Usb Ports | 1 |
| Number of Ethernet Ports | 1 |
| Print media | Envelopes, plain paper, transparencies |
| BW Pages per Minute | 42 pages per minute |
Frequently asked questions
How do I connect the HP LaserJet Pro M521dn to my network?
The listing shows Wi-Fi, one Ethernet port and one USB 2.0 port, so it can join a wireless network, a wired one or a single computer. The box is listed as the printer, a CD and cables.
Is the HP M521dn a color printer?
No. It is a monochrome laser with black ink, even though the description refers to a color touchscreen for the controls.