NIIMBOT B21Pro Bluetooth Thermal Label Printer, 300 dpi

1 / 7

Product guide

NIIMBOT B21Pro Bluetooth Thermal Label Printer, 300 dpi

The NIIMBOT B21Pro is a Bluetooth thermal label printer for phone-designed labels, with a listing-claimed 300 dpi resolution and a 50 mm maximum label width. It suits product, address and organisation labels, but the listing says it is not for shipping labels.

At a glance

Prints thermal labels without ink, according to the listing.
The companion app is described as supporting text, images, QR codes and barcodes.
The listing claims up to four hours of continuous working time after 1.5 hours of charging.
Listed for iOS and Android phones, with PC compatibility requiring a downloaded driver.

Price

£67.99Save 15%

Reference price: ~~£79.99~~

Price checked: 12 Nov 2026

View offer

Often bought together

NIIMBOT Grayscale Label Roll for B1 Pro/B2 Pro/B21 Pro Label Maker | 54x84mm 95Pcs/Roll Self-Adhesive Thermal Sticker Labels for Photos, Journals, Scrapbooks, Planners & Custom Logo Design

£8.99

Pros and cons

Pros

The stated 20–50 mm media range covers a variety of compact product and organisation labels.
One pack of 50x30mm labels, stated as 230pcs/Roll, is listed as included.
Bluetooth printing and an app-based design workflow avoid requiring a separate label-design computer for phone users.

Cons

The listing explicitly says it is not for shipping labels.
Tablet use is not supported and is specifically not recommended in the listing.

Technical specifications

19 specifications

Identity
Brand	NIIMBOT
Model	B21Pro

Printing
Technology	Thermal
Resolution	300 x 300
Listed maximum print speed	50 ppm
Output type	Colour
Ink colour	Red, black
Print media	Labels
Paper size	20-50 Millimetres
Maximum supported paper size	2 inches
Duplex	Simplex
Additional printer functions	Print Only
Number of trays	1
Maximum sheet capacity	10

Connectivity and controls
Wireless connection listed	Bluetooth
Hardware interface	USB Type C

Dimensions and installation
Dimensions listed	13D x 9.4W x 6.1H centimetres
Weight listed	321 Grams

Power
Power consumption	10 Watts

What to know before buying

Listing details to confirm

Listing details are inconsistent about colour capability and output: it describes black-and-red dual-colour printing and lists red and black ink colours, but also lists colour output and a colour printer resolution. The listed 50 ppm speed and 10-sheet capacity appear in printer fields, but the listing does not explain how they apply to label printing. Check the selected listing and media requirements if these points matter. The listing claims up to four hours of continuous use after a 1.5-hour charge, but gives no usage conditions for that estimate.

What’s in the box

Included

Labels

Who is it for?

A good fit for

Home, office or small-business users making product, ingredient, price, clothing or address labels.
Phone users who want to lay out text, images, QR codes or barcodes in an app.
Buyers who need label widths between 20 and 50 mm and do not need shipping labels.

Less suited to

Anyone needing conventional shipping labels.
Buyers who require tablet compatibility or confirmed photo reproduction quality.

NIIMBOT B21Pro Bluetooth Thermal Label Printer, 300 dpi · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 317 ratings

5 stars73%73%
4 stars14%14%
3 stars5%5%
2 stars3%3%
1 star5%5%

Customer feedback highlights positive impressions of print quality and functionality, while image quality and label recognition receive mixed or negative comments, including reports of poor picture reproduction and labels not being recognised. This matters most if you plan to print images or rely on automatic media recognition. The listing claims grayscale image printing and automatic RFID label recognition, but those specifications do not establish consistent results. The overall rating distribution is mostly five-star, with a smaller spread of lower ratings, but ratings alone do not explain individual experiences.

Positive themes

Customers describe print quality and functionality positively.

Negative themes

Image quality receives negative feedback, including a report of poor picture reproduction.

Mixed feedback

Label recognition receives mixed feedback, with reports of labels not being recognised.

Frequently asked questions

What devices can be used with the B21Pro?

The listing says it works with iOS and Android phones and can work with a PC after downloading a NIIMBOT driver. It says the printer is not compatible with tablets and does not recommend tablet use.

What label sizes does it support?

The listing describes a width range of 20–50 mm and also gives a maximum supported paper size of 2 inches. It says the printer is not for shipping labels.

Does it print in colour?

The listing is inconsistent. It claims black-and-red dual-colour printing and lists red and black ink colours, while also labelling the output as colour. Confirm the required media and output capability before buying.

Are labels included?

The contents field lists labels, and a feature description specifies one pack of 50x30mm labels, stated as 230pcs/Roll.