We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Memory size64 MB Flash
  • Interface typeUSB
  • Printing methodDirect Thermal
  • Cutter typeRewind
  • Ribbon typeThermal, Thermal
  • Accepted media sizes50 mm × 50 mm × 30 mm
  • 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.

How it compares

Measured against everything we stock in Thermal Label & Receipt Printers, at today’s prices. Recalculated every night.

Price $70.99
Cheaper than about 57% of the 858 comparable items (median $84.99).
Memory size 64 MB Flash
Typical for this category: the median of 163 items is 0.06 GB.

Specifications

Product
Brand nameCASIO
Model nameB21
Part numberB21-UK
Memory
Memory size64 MB Flash
Ports & slots
Interface typeUSB
Size & build
Product dimensions14.33 in W × 12.83 in H × 9.06 in D
Product weight321 g
Compatibility
Accepted media sizes50 mm × 50 mm × 30 mm
More details
Printing methodDirect Thermal
Cutter typeRewind
Ribbon typeThermal, Thermal
Print dimensions50 × 30 mm

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.

More in Thermal Label & Receipt Printers

Similar items