Brother RJ4250WBL Direct Thermal Mobile Label Printer
Overview
The Brother RJ4250WBL is a battery-powered 4-inch direct thermal mobile printer designed for on-demand label and tag printing at the point of work. Operating at 5 inches per second with 203 dpi resolution, it prints up to 4.09 inches wide—a fit for standard compliance labels, bin tags, and shipping documents in warehouses, receiving docks, and field service environments. Direct thermal technology eliminates ribbon changes; you load thermal-sensitive label stock, press feed, and print. This matters for high-volume, low-complexity labeling where consumable cost and maintenance overhead matter.
Connectivity
The RJ4250WBL connects via USB (Mini), Bluetooth (including Apple MFi certification), WiFi, NFC pairing, and Serial—covering mobile device printing, warehouse management system integration, and legacy serial terminals. Windows, macOS, Android, Windows Mobile, and iOS drivers are available. 256 MB RAM stores label templates and batch job queues typical in shift-long operations. The 1.58 lbs weight (without battery) and integrated LCD display with 4 navigation buttons keep operation simple during active printing runs.
Media and Output Specifications
Accepts drop-in roll media from 1.77 inches (45 mm) to 4.09 inches wide, with a maximum roll OD of 2.28 inches. Transmissive gap/hole and reflective black-bar media sensors detect label placement automatically—no manual advance guessing. Tear-up and tear-down media exit options suit different label stock styles. 64 MB Flash (42 MB user area) handles standard label designs; 256 MB RAM backs real-time batch operations. Direct thermal output fades under prolonged heat and UV exposure, so this is not suitable for long-term outdoor asset tags in high-sun environments—thermal transfer printers are required for that use case.
What's in the Box
- 1x Brother RJ4250WBL printer unit
- Lithium-ion battery with integrated charger dock
- USB cable (Mini)
- Quick-start guide and regulatory documentation
