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Compact white thermal label printer with Bluetooth 4.0 and 4-inch print width

Sato ST425 4 in label printer Bluetooth 4.0 203 DPI 180 mm/s

SKU CH-FC27-7G64X MPN ST425

Prints 4-inch thermal labels at 180 mm/s with 203 DPI via Bluetooth 4.0

  • Printing methodThermal
  • RFID encodingPrint only, Thermal
  • Ribbon typeThermal, Thermal
  • Accepted media sizes4 in × 6 in × 4 in
  • Media capacityST425 Printer, 24 V/2A Power Adapter, USB-C Cable, USB-C to
  • Print dimensions4 in (10.2 cm)
  • Bluetooth 4.0 pairs in seconds with phones and PCs
  • 180 mm/s prints a 4×6 label in under two seconds
  • 203 DPI resolution keeps barcodes sharp and scannable
  • Auto-detection handles label widths from 1.5″ to 4.2″ without jams
  • Works with any third-party thermal roll or fanfold stock

Thermal label printer with Bluetooth 4.0

The Sato ST425 is a 4-inch direct-thermal label printer that connects wirelessly via Bluetooth 4.0 to iOS, Android, macOS and Windows devices. It prints shipping labels up to 4.2 inches wide at 180 mm/s with a 203 DPI resolution. The package includes the printer, a 24 V power adapter, USB-C and USB-A cables, ten 4×6 labels and a quick-start guide.

Small businesses printing 4×6 shipping labels

This printer suits sellers on platforms such as Etsy, Shopify or USPS who need fast, cable-free 4×6 label output and want the freedom to use third-party thermal rolls from 1.5 to 4.2 inches wide. It is not for operations that require ribbon-based thermal-transfer printing, colour output, labels wider than 4.2 inches or a wired Ethernet connection.

203 DPI direct-thermal resolution

The single specification that decides fit is the 203 DPI direct-thermal print engine; it delivers sharp barcodes for standard shipping labels but cannot produce the higher-density graphics or durable thermal-transfer images that some specialised logistics workflows demand.

How it compares

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

Price $78.99
Typical for this category: the median of 858 items is $84.99.

Specifications

Product
Brand nameSato
Product lineST425
Model nameST425
Part numberST425
Size & build
Product dimensions5 in × 7.99 in × 4 in
Compatibility
Accepted media sizes4 in × 6 in × 4 in
In the box
In the boxST425 Printer, 24 V/2A Power Adapter, USB-C Cable, USB-C to USB-A Adapter, 10pcs 4 × 6 Thermal Labels, Quick Start Guide
More details
Printing methodThermal
RFID encodingPrint only, Thermal
Ribbon typeThermal, Thermal
Media capacityST425 Printer, 24 V/2A Power Adapter, USB-C Cable, USB-C to USB-A Adapter, 10pcs 4 × 6 Thermal Labels, Quick Start Guide
Print dimensions4 in (10.2 cm)

Questions about this item

How often will the print head need replacing on the ST425?

The ST425 uses direct thermal printing, so there is no ribbon or print head cartridge to replace — only the thermal labels themselves.

What limits continuous printing on the ST425 at 180 mm/s?

The 24 V / 2 A power adapter and the 203 DPI thermal engine set the practical ceiling for sustained output.

How loud and hot does the ST425 get during an all-day run?

With no cooling fan and a low-voltage 24 V supply, the ST425 runs quietly and stays warm rather than hot during extended sessions.

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