Zebra ZD421 label printer Thermal transfer 300 x 300 DPI 305 mm/sec Wired & Wireless Ethernet LAN Bluetooth

The Zebra ZT400 Series industrial printers deliver versatile, reliable thermal printing for manufacturing, transportation and logistics, retail and other demanding environments. Available in 4 in. and 6 in. models and three print resolutions, the ZT400 family supports a wide range of label formats and media types. A large color touch display shows printer status and simplifies configuration, while field-installable options for connectivity, media handling and RFID enable feature upgrades as needs change. Built on Zebra’s Link-OS and Print DNA suite, these printers are designed for straightforward integration, remote management and long-term firmware and tool support.

Advantages

The ZT400 Series offers multiple print resolutions and widths to suit varied applications, plus optional RFID encoding for enhanced tracking. Dual USB Host ports allow direct connection of peripherals and easy transfer of firmware and formats. A 4.3-inch full-color touch display provides an intuitive icon-based interface for quick adjustments. Built-in Ethernet, Serial, USB and Bluetooth come standard, and an optional dual-band 802.11ac wireless card is available. Robust processing power and expandable media handling options enable future upgrades without replacing the printer.

Suitable for

• Industrial label printing in manufacturing
• Shipping and logistics barcode and asset labels
• Retail shelf and product labeling
• Environments requiring RFID encoding (with optional module)

Key specifications

• Print technology: Thermal transfer
• Available print resolutions: 203 dpi, 300 dpi, 600 dpi (600 dpi on select 4 in. models)
• Models: 4 in. and 6 in. widths
• Connectivity: Ethernet, Serial, USB, dual USB Host, Bluetooth 4.1; optional dual-band 802.11ac Wi‑Fi and Bluetooth
• Display: 4.3-inch full-color touch display
• Media handling: Multiple field- or factory-installable options and two open media slots
• RFID: Factory- or field-installable RFID options; dedicated on-metal tagging solution available

How to use

Install the printer according to your site requirements, choose the appropriate model and resolution for your labels, then load ribbon and media. Use the color touch display to navigate the icon-based menus for language, connectivity and print settings. Connect peripherals such as scanners or keyboards to the dual USB Host ports, or use a USB memory stick to transfer firmware and configuration files. If required, install RFID or media handling modules as field upgrades and configure RFID encoding through the printer settings.

Recommendations

Choose the model width and resolution that match your label size and barcode density requirements. Use the dual USB Host ports to streamline configuration and data entry, and consider factory or field RFID options when tracking or asset visibility are needed. Keep firmware and Print DNA tools up to date to maintain compatibility and security.