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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

  • Print TechnologyThermal
  • RFID Encoderprint_only, Thermal
  • Ribbon Characteristicsthermal, Thermal
  • Media sizes supported4 in x 6 in x 4 in
  • Total Media CapacityST425 Printer, 24V/2A Power Adapter, USB-C Cable, USB-C to U
  • Print Size4 inches
  • 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.

Highlights

  • 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

Specifications

BrandSato
SeriesST425
ModelST425
Part NumberST425
Print TechnologyThermal
RFID Encoderprint_only, Thermal
Ribbon Characteristicsthermal, Thermal
Media sizes supported4 in x 6 in x 4 in
Total Media CapacityST425 Printer, 24V/2A Power Adapter, USB-C Cable, USB-C to USB-A Adapter, 10pcs 4x6 Thermal Labels, Quick Start Guide
Print Size4 inches
Dimensions5 in x 7.99 in x 4 in
Package ContentsST425 Printer, 24V/2A Power Adapter, USB-C Cable, USB-C to USB-A Adapter, 10pcs 4x6 Thermal Labels, Quick Start Guide

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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