The Zebra ZT421 is a robust industrial label printer that offers both direct thermal and thermal transfer printing technologies with a resolution of 8 dots per millimeter (203 dpi). This model features a maximum media width of 178 mm and a print width of 168 mm, accepts media rolls with a diameter of up to 203 mm, and achieves print speeds of up to 305 mm per second. Comprehensive connectivity options include USB, RS232 serial, Bluetooth wireless, and Ethernet LAN interfaces for flexible integration into various work environments. The printer is equipped with 256 MB of RAM and 512 MB of flash memory to handle complex labeling tasks and supports EPL, ZPL, and ZPLII programming emulations for broad compatibility. Operational features include a built-in automatic cutter for precise label separation and a color touchscreen display for intuitive control and status monitoring. Constructed with a black-gray housing, the printer measures approximately 432 mm in width, 279 mm in depth, and 254 mm in height, with a substantial weight of 21.96 kg, ensuring operational stability. This successor model to the previous ZT400 series printers upholds Zebra's reputation for reliability in medium-volume labeling applications across logistics, manufacturing, and retail sectors. The unit includes a power cable compatible with EU and UK standards, along with optional interface cables for extended connectivity requirements.