MUNBYN RW403B 4×6 Bluetooth Thermal Label Printer

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Product guide

MUNBYN RW403B 4×6 Bluetooth Thermal Label Printer

The MUNBYN RW403B is a monochrome thermal label printer with Bluetooth and USB connections, intended for 4 × 6-inch labels. Bluetooth is listed for computers, Chromebooks and mobile devices, while USB is listed for Windows and macOS.

At a glance

Thermal monochrome printing avoids the need for ink, according to the listing's No Ink specification.
Bluetooth connectivity is listed for Windows, macOS, ChromeOS, Android and iOS. USB is listed for Windows and macOS.
The listed 4 × 6-inch maximum supported paper size suits common shipping-label dimensions.
Customer feedback mentions quick printing and straightforward setup, but also mixed experiences with whether the printer works.

Price

£69.98Save 26%

Reference price: ~~£94.99~~

Price checked: 12 Nov 2026

View offer

Often bought together

MUNBYN Bluetooth Shipping Label Printer, 4x6 Thermal Printer, 403B, White | for Small Business, Compatible with iPhone, Andro

£17.99

Pros and cons

Pros

Bluetooth options cover desktop and mobile operating systems, with USB also listed for Windows and macOS.
Compact listed dimensions and 1.3 kg weight may suit a small packing or home-office space.
The explicit package contents list includes 30 sheets of white labels.

Technical specifications

18 specifications

Identity
Brand	MUNBYN
Model	RW403B
Colour	White
Printing technology	Thermal
Output	Monochrome
Print functions	Print Only

Connectivity and controls
Connections listed	Bluetooth for Windows, macOS, ChromeOS, Android, and iOS; USB connection for Windows and macOS
Control method	App
Hardware interface	Bluetooth

Printing and media
Resolution	203 DPI
Maximum supported paper size	4 x 6 inch
Print media	Labels
Duplex	Simplex
Maximum print speed, monochrome	150
Initial page print time	1 Seconds

Dimensions and installation
Dimensions	9.1D x 18.6W x 9.2H centimetres
Weight	1.3 Kilograms

Warranty
Product warranty	2 years

What to know before buying

The listing's 150 print-speed figure has no unit, so it cannot be interpreted as a confirmed pages-per-minute or labels-per-minute rate. The one-second initial print-time figure is also listed without further operating context.
The listing claims a 970,000-label lifespan, a jam rate below 0.01%, and 99.8% accuracy or misalignment reduction. These are manufacturer claims, not independently established performance.
Bluetooth is listed across several operating systems, but USB is specified only for Windows and macOS. Confirm the connection and app workflow for the device you plan to use.

What’s in the box

Included

1× RW403B Label Printer
User manual
1× Quick Start Guide
Power adapter
1× Power Cord
1× USB-C to USB-A Adapter
1× USB Cable
30 Sheets of White Labels

Who is it for?

A good fit for

Small businesses and home sellers printing 4 × 6-inch postage labels.
Buyers who want a compact thermal printer with Bluetooth options for computers and mobile devices.
Users who can work within the stated USB operating-system support when choosing a wired connection.

Less suited to

Buyers who need colour printing or a multifunction printer.
Buyers who require a clearly specified print-speed unit before purchase.
Anyone who needs confirmed USB support for ChromeOS, Android or iOS.

MUNBYN RW403B 4×6 Bluetooth Thermal Label Printer · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 584 ratings

5 stars75%75%
4 stars6%6%
3 stars3%3%
2 stars4%4%
1 star12%12%

Customer feedback highlights quick postage-label printing, easy setup, compactness and Bluetooth connectivity. Those reports align with the printer's listed thermal label function and compact dimensions, while the feedback also describes mixed functionality, including reports that it would not print. Buyers relying on it for dispatch should account for that uncertainty and confirm that their setup works.

Positive themes

Customers report quick printing and easy setup.
Customers appreciate the compact design and Bluetooth connectivity.
Customers describe it as useful for postage labels and good value.

Mixed feedback

Functionality receives mixed feedback, with some customers saying it works well and others reporting that it will not print.

Frequently asked questions

What label size does the MUNBYN RW403B support?

The listing gives 4 x 6 inch as its maximum supported paper size.

Which devices can connect to the RW403B?

Bluetooth is listed for Windows, macOS, ChromeOS, Android and iOS. USB is listed for Windows and macOS.

Does this printer use ink?

The listing specifies thermal printing and No Ink.

What is included in the listed package?

The manufacturer contents list names the printer, user manual, quick start guide, power adapter, power cord, USB-C to USB-A adapter, USB cable and 30 sheets of white labels.