NIIMBOT B21 Pro Red-Black Label Maker 300 DPI
- 300 dpi thermal, red and black printing
- Labels 20-50 mm wide, up to 200 mm long
- 48 mm printable width
- Bluetooth to phones, USB to PC
- 1 roll of 50x30 mm labels (230 pcs) included
- 2-year warranty
Updated 25 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A sharp two-color thermal label maker for small businesses and home organizing, run from a phone or PC. Color and photo labels need special paper, and tablets are not supported.
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ASIN: B0FMJPJ7ZTModel: B21 ProCategory: Label Printers
Colors Available
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Overview
Not an ink printer, this NIIMBOT label maker uses heat on thermal labels, adding red alongside black when special red-black stock is loaded. A phone app over Bluetooth or a computer over USB designs and sends each label.
Two-color printing and fine resolution make product and pantry labels look polished, and the free app covers fonts, borders, symbols and QR codes. Color and photo printing require NIIMBOT's special label paper, and tablets are not supported.
Who it's for
Small sellers, home organizers and shops labeling products and shelves get crisp two-color labels from a phone. Tablet users and anyone wanting standard office label sheets should look elsewhere.
Pros and cons
- Red and black printing
- Sharp output for small text
- Free app with fonts and symbols
- Auto label recognition
- Color needs special label paper
- Not for tablets
- Narrow maximum label width
Performance notes
Print quality comes from the thermal head's resolution, which handles small text and QR codes. Auto label recognition reads the loaded roll so layouts match the stock, and the printer avoids wasting the first label. Red only appears on compatible two-color label rolls.
Specifications
| Brand | NIIMBOT |
|---|---|
| Model | B21 Pro |
| Dimensions & fit | |
| Item Dimensions D x W x H | 5.12 x 3.7 x 2.4 inches |
| Printable width | 48 mm |
| Paper Size | 20-50 mm (0.8-2 in) wide, up to 200 mm long |
| Item weight | 11.36 oz |
| Construction & materials | |
| Ink Color | Red, black (special labels) |
| Color | White |
| Compatibility & installation | |
| Printer Connectivity Type | Bluetooth |
| Hardware Interface | USB |
| Compatible Devices | Android, iOS, PC; not tablets |
| Warranty & support | |
| Warranty Description | 2 year |
| Other details | |
| Resolution | 300 dpi |
| Printer Type | Thermal |
| BuiltIn Media | 1 roll 50x30 mm labels, 230 pcs |
| Other Special Features of the Product | Auto label recognition, grayscale photo printing, Bluetooth multi-connection, no first-label waste |
Frequently asked questions
What comes in the box with the NIIMBOT B21 Pro?
The listing says it comes with 1 roll of 50x30mm labels (230 pcs) in the paper bin. Other contents, such as a USB cable, are not itemized.
Do I need a membership for the NIIMBOT app?
No VIP membership is needed for daily use; the free fonts and icons cover it, and NIIMBOT says it updates the free resources regularly.
Can the NIIMBOT B21 Pro print photos?
It supports grayscale photo printing, but photo and color printing require special label paper.
How do I fix NIIMBOT Bluetooth trouble on Android?
Upgrade the printer's Bluetooth firmware via iOS or PC, then double-press the power button to print a self-test page showing Bluetooth version 7470.