NIIMBOT B21 Pro Bluetooth Label Maker 300 DPI
- 300 DPI thermal print head
- 20 to 50 mm label widths
- Black and red dual color labels supported
- iOS, Android and PC (PC needs a driver)
- 16 grayscale levels for images
- 2 year warranty
Updated 25 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A sharper thermal label maker that also works with a PC through a driver and handles wider labels. Red output needs the special dual color labels, and the box contents are not spelled out.
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ASIN: B0FHK24LJWModel: B21 ProCategory: Label Printers
Colors Available
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Overview
NIIMBOT built this label maker around a higher density thermal head, so small text and codes print crisper on labels up to fifty millimeters wide. It pairs with phones over Bluetooth through the NIIMBOT app and with a PC through a downloaded driver.
Fine print detail plus PC support makes it more useful for product labels and small business barcodes. The listing never says how many labels or rolls ship with it, and the red print depends on buying dual color stock.
Who it's for
Etsy sellers, pantry organizers and teachers who need sharp small text will use the extra detail. Shoppers expecting color photos on plain label stock will be let down, since color comes only from special media.
Pros and cons
- Fine print head for small text
- Phone and PC support
- Wide label range for product tags
- Dual color red and black labels
- PC use requires a separate driver download
- Included label quantity not listed
- Red needs dual color label stock
- Battery details not listed
Performance notes
Print sharpness comes from the dense thermal head, which places more dots across each character than lower density models. Grayscale rendering dithers images in shades of one color, so photos read as monochrome. Media recognition reads the loaded label, so genuine NIIMBOT labels avoid misfeeds.
Specifications
| Brand | NIIMBOT |
|---|---|
| Model | B21 Pro |
| Dimensions & fit | |
| Item Dimensions D x W x H | 2.4 x 3.7 x 5.1 inches |
| Maximum Media Size | 50x90 mm |
| Paper Size | 54x80 mm |
| Capacity & performance | |
| Printer Output Type | Monochrome; black and red with dual color labels |
| Construction & materials | |
| Color | White |
| Compatibility & installation | |
| Printer Connectivity Type | Bluetooth |
| Compatible Devices | iOS, Android, PC (driver required) |
| Warranty & support | |
| Warranty Description | 2 years |
| Other details | |
| Maximum Print Resolution Black and White | 300 dpi |
| Resolution | 300 x 300 |
| Printer Type | Thermal |
| BuiltIn Media | Labels |
| Other Special Features of the Product | 16 grayscale printing, label recognition, Bluetooth multi-connection |
| BW Pages per Minute | 50 |
Frequently asked questions
How do I keep NIIMBOT B21 Pro prints sharp over time?
Use NIIMBOT labels so label recognition reads the roll correctly, and keep the app updated. The listing gives no cleaning instructions.
Does the NIIMBOT B21 Pro work with a computer?
Yes. Download the driver from the NIIMBOT official website for PC use. Phones connect through the NIIMBOT app.
What label widths does the B21 Pro take?
Label widths from 20 to 50 mm.
Can the B21 Pro print red?
Only on red and black dual color labels. Standard labels print in black.
What is the difference from the B21?
The B21 Pro raises print sharpness to 300 DPI, for smaller and finer text.