NIIMBOT B21 Green 2-Inch Bluetooth Thermal Label Maker

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Product guide

NIIMBOT B21 Green 2-Inch Bluetooth Thermal Label Maker

Maker: The NIIMBOT B21 is a green Bluetooth thermal label printer for monochrome labels up to 2 inches wide. Its compact size and app-based label creation suit everyday organization and small-batch labeling, while customer feedback is mixed on print clarity and connectivity.

At a glance

The listing describes app-based label design and Bluetooth printing, with templates and batch-printing functions.
Listed label widths are 0.8 to 2 inches, covering small organization and retail labeling tasks.
Thermal printing avoids ink and toner, according to the listing. The claimed consumable is label paper.
The manufacturer claims one charge supports four hours of work. The printer is also said to shut down after a 15-minute pause.

Price

$52.79Save 20%

Reference price: ~~$65.99~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Case for NIIMBOT B21/Pro/B1, for SUPVAN T50M Pro Label Maker Accessories | Wireless Thermal Printer Holder, Labeling Tapes Roll Refills Storage, Home/Office Use, Mesh Pocket, Hard Case Only, Green

$17.99

NIIMBOT Thermal Label Maker Paper 50×30 mm 230 Labels/Roll White 3Packs, for B1 B21 B31 B3S K3 Label Maker

$17.99

Pros and cons

Pros

Compact listed dimensions and a weight of 11.2 ounces make it easier to keep near a desk or packing area.
Thermal monochrome printing avoids replacing ink or toner, with label media remaining a required consumable.
The app is described as offering templates, image recognition and batch printing.

Cons

Monochrome output is limited to black-and-white labeling rather than color graphics.
The listing's claimed four-hour working time may not suit long, uninterrupted print sessions.

Technical specifications

15 specifications

Identity
Brand	NIIMBOT
Model	B21
Color	Green
Printer output	Monochrome
Printing technology	Thermal
Print resolution	203DPI
Maximum media size	2 inches
Media	Labels

Connectivity and controls
Wireless connection listed	Bluetooth
Control methods listed	App
Compatible devices listed	Smartphones

Dimensions and installation
Dimensions listed	2.4"D x 3.7"W x 5.1"H
Weight listed	11.2 ounces

Power and operation
Battery working time per charge, claimed	4 hours
Automatic power-off pause, claimed	15 minutes

What to know before buying

Listing details to confirm

Several listing details are inconsistent or unconfirmed: maximum media size is stated as 2 inches while the feature text specifies 0.8–2-inch label widths, and the listing also gives a 25x50 centimeters paper size. It separately claims 60 pages per minute for a label printer. Confirm the supported media and what the speed figure means before buying.

Who is it for?

A good fit for

People organizing home, office or small-business items with monochrome labels.
Users who want to design labels in an app and send print jobs over Bluetooth.
Small retailers or makers labeling products, prices, barcodes or packages within the listed media width.

Less suited to

Buyers who need color printing or broad-format shipping labels.
Anyone who requires consistently verified print clarity or dependable phone connectivity, given the mixed customer reports.

NIIMBOT B21 Green 2-Inch Bluetooth Thermal Label Maker · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 1,151 ratings

5 stars78%78%
4 stars8%8%
3 stars5%5%
2 stars1%1%
1 star8%8%

Customer feedback describes the printer as attractive, compact and handy for everyday labeling. Print clarity, functionality, connectivity and value draw mixed reactions: some customers report clear output and quick Bluetooth connection, while others mention blurry prints, connection problems with iPhones or iPads, and the unit ceasing to work after a year. Those issues matter for frequent or time-sensitive printing, especially since the listing gives no independent performance verification.

Positive themes

Customers describe the design as cute and the printer as compact enough to fit in the hand.
Some customers say it is handy for routine labeling and connects quickly over Bluetooth.

Negative themes

Some customers report blurry printing, connection difficulties with iPhones or iPads, or the printer stopping after about a year.
Some customers consider it overpriced.

Mixed feedback

Print quality, functionality, connectivity and value receive mixed customer feedback.

Frequently asked questions

What kinds of labels can the NIIMBOT B21 print?

It is a monochrome thermal label printer. The listing describes labels for addresses, barcodes, prices, dates and organization, with stated widths from 0.8 to 2 inches.

How does the B21 connect?

Bluetooth and app control are listed. Customer feedback on connectivity is mixed, including reports of trouble connecting to some Apple devices, so check compatibility with your phone before relying on it.

Does it need ink or toner?

The listing says thermal printing uses label media rather than ink, toner or carbon tape. Labels are still a consumable.

What comes with the printer?

The listing's built-in media field names labels, a Type-C cable and a user manual. Confirm the selected listing's package details, as no separate explicit package inventory was supplied.