Zebra - ZD421T Thermal Transfer 300dpi Desktop Barcode Label Printer USB Host Ethernet 4 IPS ZPL 4.09in Print Width - Gray

The Zebra ZD421T (ZD4A043-30EE00EZ) is a 4-inch 300 dpi thermal transfer desktop barcode label printer engineered for demanding shipping, logistics, manufacturing, retail, and healthcare labeling workflows. Powered by Zebra's Print DNA software suite including PrintSecure cybersecurity protection, this next-generation ZD421T replaces the legacy GK Series and ZD420 Series with 30% more processing power than the ZD420 and 700% more than the GK Series. The 300 dpi resolution delivers sharp, precise barcode and label output at up to 4 inches per second with a maximum print width of 4.09 inches, supporting ZPL II, EPL2, ZBI, and XML programming languages for seamless integration into existing label environments. Standard connectivity includes USB 2.0, USB Host, and Ethernet 10/100 for reliable wired network deployment. Bluetooth Low Energy 5 (BTLE5) is included for wireless printer setup via the Zebra mobile app — not for wireless printing. Prints from Windows, Android, and iOS devices via USB or Ethernet. The OpenACCESS media design and movable media sensor support virtually any roll-fed media up to 4.41 inches wide. Features 256 MB RAM, 512 MB Flash, real-time clock, dual-wall frame construction, 5-LED status interface, 3-button user interface, gap/black mark sensing, and ENERGY STAR certification.

• 300 DPI Thermal Transfer — Crisp, Durable Labels: Delivers precision 300 dpi (12 dots/mm) thermal transfer printing at up to 4 inches per second with a maximum print width of 4.09 inches. Ribbon-based printing produces long-lasting, smear-resistant barcodes, shipping labels, and asset tags that withstand harsh environments. Supports fan-fold, die-cut, continuous, and tag stock media up to 4.41 inches wide and roll diameters up to 5 inches.
• USB & Ethernet Connectivity — Wired Network Ready: Standard wired interfaces include USB 2.0, USB Host, and Ethernet 10/100 (RJ-45). Connects directly to Windows, Android, and iOS devices via USB or Ethernet. Bluetooth Low Energy 5 (BTLE5) is included exclusively for wireless printer setup using the Zebra printer setup mobile app. NFC Print Touch tag enables tap to pair and print from compatible smartphones for fast initial deployment.
• Zebra Print DNA — Security, Management & ZPL/EPL: Includes Zebra's full Print DNA software suite with PrintSecure for cyberattack protection, Printer Profile Manager Enterprise for remote fleet management, and ZBI 2.0 for on-printer scripting. Supports ZPL II, EPL2, XML, and Virtual Device emulations for backward compatibility with legacy printer fleets. Deploy into existing label environments without changing formats or applications.
• OpenACCESS & Movable Sensor — Easy Media Handling: The OpenACCESS media design simplifies label and ribbon loading with color-coded touch points for faster daily media changes. The movable media sensor supports gap, black mark, and reflective detection — compatible with virtually any roll-fed media for maximum flexibility. Real-time clock (RTC), 5-LED status icons, and 3-button interface keep operators informed and in control without guesswork.
• 256MB RAM, 512MB Flash, Dual-Wall Frame, ENERGY STAR: The ZD421T is built for reliability with 256 MB RAM, 512 MB Flash memory, and a rugged dual-wall frame construction. The real-time clock (RTC) enables time-stamped printing for compliance and traceability workflows. Supports fan-fold, die-cut, continuous, and tag stock media with gap, black mark, and reflective sensing via the movable media sensor. ENERGY STAR certified for energy efficiency.