POS printer CUSTOM D4 302-K 203x203 DPI Wired Direct thermal

D4 302-K is a compact 4" desktop label and POS printer designed for high-performance, industrial-level applications. It supports direct thermal and thermal transfer printing with a maximum resolution of 203 x 203 DPI, a maximum roll diameter of 127 mm and a maximum printing width of 104 mm. The printer includes a colorful backlit LCD for clear menu navigation, a built-in multi-function keyboard with 19 buttons, an SD card slot for data storage and a real-time clock for time and date printing. Connectivity options include USB, serial and RJ-45 (Ethernet 10/100 Mbit/s), making it suitable for retail and point-of-sale environments.

Advantages

The D4 302-K combines compact desktop size with industrial-level features: dual-mode printing (direct thermal and thermal transfer), clear backlit LCD, integrated 19-button keyboard, multiple communication ports and an SD card slot for local storage. Its 203 x 203 DPI resolution and 104 mm print width support a wide range of barcode and label printing tasks while keeping the footprint small and the installation flexible.

Suitable for

• Retail point-of-sale receipts and shelf labels
• Small to medium warehouse labelling
• Barcode and RFID label printing workflows
• On-desk printing in confined or counter spaces

Key specifications

• Print technology: Direct thermal / thermal transfer
• Maximum resolution: 203 x 203 DPI
• Maximum printing width: 104 mm
• Maximum roll diameter: 127 mm
• Connectivity: USB, Serial, RJ-45 (Ethernet 10/100 Mbit/s)
• Built-in keyboard: 19 buttons
• SD card slot: Yes
• Real-time clock: Yes
• Weight: 2 kg
• Product colour: Black

How to use

Install the printer on a stable, level surface and connect it to the host system using the selected interface (USB, serial or Ethernet). Load the media roll according to the user manual, set the printer mode to direct thermal or thermal transfer as required, and configure print width and resolution through the LCD menu or connected driver. Use the built-in keyboard for local input and the SD slot to load or store templates and data. Set the real-time clock if date/time printing is required.

Recommendations

Use recommended label media and ribbons for thermal transfer mode to ensure print quality and avoid damage. Keep the print head and feed path clean and perform periodic maintenance as described in the manual. For networked setups, configure a static IP or DHCP per site policy and verify Ethernet speed settings (10/100 Mbit/s).