Zebra ZT421 label printer Direct thermal / Thermal transfer

Indicates whether the product’s display can show color images or is limited to monochrome output. A value of "Yes" means the screen supports full‑color rendering; "No" indicates a black‑and‑white or single‑colour display.

The longest linear dimension of a media item that the product can accommodate, expressed in a standard unit such as meters, centimeters or inches. It indicates the maximum size of paper, label, tape or other material that can be handled by the device.

The widest printable dimension of a product, expressed in a linear unit such as millimetres or inches. It indicates the maximum width of paper or media that can be fed through the device for printing operations.

The type of serial communication interface supported by the product, such as RS‑232, RS‑485, RJ‑45, or SATA. It indicates which physical connectors and protocols are available for data exchange with other devices.

The type of physical storage medium that a product uses or supports, such as flash memory, hard disk drive (HDD), solid‑state drive (SSD), eMMC, or combinations thereof. It indicates the underlying technology for data persistence and helps users compare devices based on their storage capabilities.

A list of environmental, safety or quality certifications that a product has obtained from recognized authorities. Typical entries include RoHS, ENERGY STAR, CE, WEEE, TCO Certified, FCC, and other industry‑specific standards.