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Black rectangular label printer with rounded edges, compact and lightweight

CASIO B21 label printer, 64MB flash, 50x30mm print, 321g

SKU CH-777R-6GF2D MPN B21

Portable direct-thermal label maker prints 50×30 mm labels from iOS or Android via Bluetooth, includes 64 MB flash memory and a 230-label starter roll

  • Print TechnologyDirect Thermal
  • Memory64MB Flash
  • CutterRewind
  • Ribbon Characteristicsthermal, Thermal
  • Media sizes supported50 mm x 50 mm x 30 mm
  • Print Size50 x 30 millimeters
  • Direct thermal printing needs no ink or toner
  • Bluetooth link works with iOS and Android devices
  • 64 MB flash stores label templates locally
  • 321 g weight fits in a bag or drawer
  • Includes 230 labels on a 50 x 30 mm roll

Portable thermal label printer for mobile workflows

The CASIO B21 is a direct-thermal label maker that connects via Bluetooth to iOS and Android devices and via USB to a PC. It prints on media up to 50 mm wide with a fixed 50 x 30 mm print area and includes one roll of 230 white labels. The unit weighs 321 g and carries 64 MB of flash memory for stored templates.

Fits a backpack or desk without extra power gear

A built-in rechargeable battery delivers 4 hours of continuous printing after a 1.5 hour charge, so no mains adapter is required during a shift. The rewinder cutter handles label roll take-up internally, freeing bench space and removing the need for an external rewinder. USB is used only for driver-based PC printing or charging.

Steady output for batch labelling tasks

The printer is rated for 4 hours of non-stop operation on a single charge, making it suited to sustained runs such as product, price or cable labelling. It is not designed for shipping labels or wide-format media beyond 50 mm, and the manufacturer notes it is not recommended for use with tablets. Continuous printing stays consistent within the stated battery window.

Highlights

  • Direct thermal printing needs no ink or toner
  • Bluetooth link works with iOS and Android devices
  • 64 MB flash stores label templates locally
  • 321 g weight fits in a bag or drawer
  • Includes 230 labels on a 50 x 30 mm roll

Specifications

BrandCASIO
ModelB21
Part NumberB21-UK
Print TechnologyDirect Thermal
Memory64MB Flash
CutterRewind
Ribbon Characteristicsthermal, Thermal
Media sizes supported50 mm x 50 mm x 30 mm
Print Size50 x 30 millimeters
InterfaceUSB
Dimensions14.33in W x 12.83in H x 9.06in D
Weight321 grams

Questions about this item

How long does the B21 run continuously on a single charge?

The B21 label printer operates for 4 hours of continuous printing after a 1.5 hour charge cycle.

Does the B21 get hot or loud during all-day label printing?

Direct thermal printing with a rewind cutter runs silently and produces minimal heat during extended use.

What mobile device and app are required to design and send labels to the B21?

An iOS or Android smartphone with the free NIIMBOT app installed is needed; the printer is not compatible with iPad or other tablets.

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