NIIMBOT B21 Bluetooth Thermal Label Printer 2 Inch
- 2 inch thermal label printer
- Bluetooth, controlled from an app
- 50 x 80mm maximum media size
- 11.2 ounces, 2.4 x 3.7 x 5.1 inches
- Type-C cable, labels and manual included
- 2 year warranty
Last refreshed Sep 23, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A pocket-size Bluetooth thermal label printer driven from a phone app, for home, gift and office labels. It is print only, and phone compatibility is not spelled out.
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ASIN: B0F5PRTWVYModel: B21Category: Label Printers
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Overview
Labeling over a Bluetooth link is how this NIIMBOT thermal printer works, with no ink or toner. It recognizes the loaded label, offers multiple templates in its app and wastes no first label.
Thermal printing removes ink from the picture, and the app brings template choice to a small body. The listing names no supported phone systems and gives two different resolution figures, so check the app listing before buying.
Who it's for
A hobbyist or small seller who makes small labels from a phone and wants a portable unit. Office users who print full pages, or who rely on a desktop app, need a different tool.
Pros and cons
- No ink or toner needed
- No first-label waste
- Compact and portable
- Type-C cable included
- Print function only
- Two resolution figures given
- Phone systems supported are not named
Performance notes
A thermal head heats the label to form the image, which is why no ink is used. The unit senses the loaded label size, and the app sets the template. Resolution is listed two ways, so sharpness for small text is uncertain.
Specifications
| Brand | NIIMBOT |
|---|---|
| Model | B21 |
| Dimensions & fit | |
| Item Dimensions D x W x H | 2.4"D x 3.7"W x 5.1"H |
| Maximum Media Size | 50*80mm |
| Paper Size | 50x30mm |
| Item weight | 11.2 ounces |
| Capacity & performance | |
| Printer Output Type | Monochrome |
| Construction & materials | |
| Color | Pink |
| Compatibility & installation | |
| Printer Connectivity Type | Bluetooth |
| Warranty & support | |
| Warranty Description | 2 Years Warranty |
| Other details | |
| Maximum Print Resolution Black and White | 203dpi |
| Printer Type | Thermal Direct |
| BuiltIn Media | Labels, Type-C Cable, User Manual |
| Control method | App |
Frequently asked questions
Does the NIIMBOT B21 work with iPhone and Android?
The listing says it is controlled by an app over Bluetooth but does not name supported phone systems, so check the app store listing.
What label sizes does the NIIMBOT B21 print?
The listing gives a maximum media size of 50*80mm and a paper size of 50x30mm.
Can the NIIMBOT B21 print documents?
No. It is a print-only thermal label printer for labels.