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Black rectangular thermal label printer with rounded edges and a top label roll compartment

Honeywell RP421A-BU-BK 4x6 Bluetooth Thermal Label Printer

SKU CH-7HC1-6QJFD

Direct thermal 4×6 in label printer with Bluetooth and USB interfaces, no ink required, compatible with Windows 98/ME/2000/XP, macOS, Android and iOS

  • Interface typeUSB
  • Printing methodDirect Thermal
  • Ribbon typeNo Ink, Thermal
  • Accepted media sizes4.1 in × 9.5 in × 4 in
  • Print dimensions4 × 6 in
  • OS compatibilityWindows 98/ME/2000/XP
  • Wireless printing from phones via Bluetooth
  • USB cable printing for Windows and Mac
  • Direct thermal technology needs no ink or toner
  • Works with Amazon FBA, eBay, Shopify and more
  • 4 x 6 inch labels for standard shipping use

Honeywell RP421A-BU-BK 4x6 Label Printer

The Honeywell RP421A-BU-BK is a direct thermal barcode and label printer that produces 4 by 6 inch shipping labels without ink or toner. It targets small businesses and online sellers who need wireless or USB label printing for platforms such as Amazon FBA, eBay and Shopify.

Driver installation and Bluetooth pairing

Windows and Mac users must download drivers from the manufacturer website or supplied media before connecting the USB cable. Mobile users pair the printer via Bluetooth and print through the RT-Elabel app; the pairing code is 0000 or 000000 when prompted.

Sustained thermal printing without consumables

Direct thermal technology eliminates ribbon and ink costs, so running expense stays flat during high-volume sessions. The unit prints black-and-white labels continuously while the media roll lasts, avoiding the cartridge changes that interrupt ink-based printers.

How it compares

Measured against everything we stock in Thermal Label & Receipt Printers, at today’s prices. Recalculated every night.

Price $53.99
Cheaper than about 69% of the 858 comparable items (median $84.99).

Specifications

Product
Brand nameHoneywell
Model nameRP421A-BU-BK
Part numberRP421A
Ports & slots
Interface typeUSB
Size & build
Product dimensions14.33 in W × 12.83 in H × 9.06 in D
Compatibility
Accepted media sizes4.1 in × 9.5 in × 4 in
OS compatibilityWindows 98/ME/2000/XP
Mac compatibilityiOS
In the box
In the boxLabels
More details
Printing methodDirect Thermal
Ribbon typeNo Ink, Thermal
Print dimensions4 × 6 in

Questions about this item

How do I confirm the RP421A-BU-BK is printing correctly after Bluetooth pairing?

Print a test label using the RT-Elabel app on iOS or Android; a clear 4 x 6 inch thermal image without ink smudges shows the direct thermal engine is working.

What ships in the box and what must I supply myself?

The package includes starter labels; you must provide a USB cable for PC or Mac connection and download drivers from rongtaglobal.com/rp421a or the QR code sheet.

Which RP421A version should I choose for 4 x 6 inch shipping labels?

The RP421A-BU-BK model supports 4 x 6 inch direct thermal printing on media up to 4.1 x 9.5 inches, matching standard carrier label sizes.

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