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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

  • Print TechnologyDirect Thermal
  • Ribbon CharacteristicsNo Ink, Thermal
  • Media sizes supported4.1 in x 9.5 in x 4 in
  • Print Size4 X 6 inches
  • InterfaceUSB
  • Windows CompatibleWindows 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.

Highlights

  • 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

Specifications

BrandHoneywell
ModelRP421A-BU-BK
Part NumberRP421A
Print TechnologyDirect Thermal
Ribbon CharacteristicsNo Ink, Thermal
Media sizes supported4.1 in x 9.5 in x 4 in
Print Size4 X 6 inches
InterfaceUSB
Windows CompatibleWindows 98/ME/2000/XP
Macintosh CompatibleiOS
Dimensions14.33in W x 12.83in H x 9.06in D
Package ContentsLabels

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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