NIIMBOT B21Pro 300DPI Bluetooth Thermal Label Printer

Create sharp, professional labels without buying ink or toner. The compact NIIMBOT B21Pro connects to compatible phones and computers, supports 20–50 mm / 0.79–1.97 in labels and prints detailed text, barcodes, QR codes and graphics.

Designed for home organisation, cafés, bakeries, retail counters and small businesses, this portable thermal printer makes it easy to produce customised labels whenever they are needed. Edit designs through the compatible app, load the label roll and print clear adhesive labels in seconds.

Key Features

• High-Resolution 300DPI Printing: Produces clearer small text, detailed graphics, barcodes and QR codes than standard lower-resolution label printers.
• Ink-Free Thermal Technology: Prints directly onto compatible thermal labels, eliminating replacement ink cartridges, ribbons and toner.
• Bluetooth and Computer Connectivity: Create and print labels from compatible smartphones, tablets or computers using supported software and connection methods.
• Wide 20–50 mm Label Support: Accommodates label widths from 20–50 mm / 0.79–1.97 in for food containers, storage jars, packaging, price tags and product identification.
• Portable Rechargeable Design: The integrated battery allows the printer to be moved between workstations, kitchens, market stalls and retail counters.

Create Labels for Multiple Uses

The B21Pro can produce customised labels for:

• Food names, ingredients and expiry dates
• Pantry jars and storage containers
• Coffee cups and takeaway packaging
• Bakery, cake and dessert pricing
• Product names and inventory codes
• Barcodes and QR codes
• Retail price tags
• Photos and decorative stickers
• Business packaging and branding
• Filing, office and home organisation

App Editing Functions

The compatible editing application supports a range of design options, including:

• Text and different font styles
• Images and monochrome photos
• Barcodes and QR codes
• Borders, symbols and icons
• Date and time information
• Batch label printing
• Saved and reusable templates
• Multiple label shapes and dimensions

Supplier imagery indicates access to more than 1,000 design templates; template availability may depend on the current app version, account and region.

Simple Three-Step Operation

1. Open the printer and install a compatible thermal label roll.
2. Connect the printer to the compatible mobile app or computer software.
3. Edit the design, print the label, peel the backing and apply it.

No ink or toner is required.

Supported Label Sizes

• Compatible label width: 20–50 mm / 0.79–1.97 in
• Maximum roll width shown: 50 mm / 1.97 in
• Example label sizes shown:
  • 30 × 20 mm / 1.18 × 0.79 in
  • 40 × 20 mm / 1.57 × 0.79 in
  • 40 × 30 mm / 1.57 × 1.18 in
  • 50 × 30 mm / 1.97 × 1.18 in
  • 50 × 50 mm / 1.97 × 1.97 in
  • 50 × 70 mm / 1.97 × 2.76 in
  • 50 × 80 mm / 1.97 × 3.15 in

Compatible label rolls are required. Printing results and available sizes depend on the installed label type.

Technical Specifications

• Brand: NIIMBOT
• Model: B21Pro
• Product Type: Portable thermal label printer
• Print Technology: Direct thermal
• Print Resolution: 300DPI
• Maximum Print Speed Claimed: Up to 20 ppm
• Label Width Compatibility: 20–50 mm / 0.79–1.97 in
• Connectivity: Bluetooth; supplier materials also show computer connection
• Compatible Devices: Supported smartphones, tablets and computers
• Power Type: Built-in rechargeable battery
• Input Voltage Compatibility: Supplier reference states 100–240V power compatibility when used with a suitable adaptor
• Print Colour/Color: Monochrome black thermal printing
• Housing Colour/Color: Cream/beige appearance shown
• Paper Feed: Automatic and manual support stated by supplier
• Ink or Toner Required: No

Material and Build

• Outer Housing: Moulded plastic construction
• Internal Print Mechanism: Thermal print head and roller assembly
• Label Holder: Integrated roll compartment
• Controls: Front power/function button with status indicator
• Design: Compact desktop body with a retro-style front panel

What Is Included

Based strictly on the supplied product information, the confirmed package contents are:

• 1 × NIIMBOT B21Pro thermal label printer
  
• 1x White roll

A charging cable, label roll, power adaptor and printed manual are not clearly confirmed in the supplied packing information and should not be advertised as included unless verified with the supplier.

Important Compatibility Notes

• Use only compatible direct-thermal label rolls.
• Thermal printing is monochrome; coloured label results come from pre-coloured label material, not colour ink.
• Bluetooth app compatibility may vary by phone operating system, region and current app version.
• Computer connection may require compatible software, drivers or a wired connection.
• Water resistance and tear resistance depend on the specific label material selected.
• RFID automatic recognition applies only to compatible NIIMBOT label rolls that support this function.