| B/W or Color | Monochrome |
| Brand | Zebra Technologies, Zebra |
| Connectivity / Wireless Ready, ENERGY STAR | Yes |
| Depth | 49.5 |
| Device Type | Print server, Power supply |
| Document & Media Handling / Media Type Class, Media Size Class | Other |
| Functions, Type | Printer |
| Height | 32.4 |
| Interface | USB host, USB 2.0, LAN, Bluetooth 4.1, Serial |
| Language Simulation | EPL, ZPL II, EZPL, ZPL, EPL2 |
| Max H-Document Size | 178 mm |
| Max Media Size | Roll (17.8 cm) |
| Max Print Resolution B/W | 300 dpi |
| Max Print Speed B/W | 254 |
| Model | ZT421 |
| Packaged Quantity | 1 |
| Product Color | Gray, Black |
| Product Line | Zebra ZT400 Series |
| RAM Size | 256 |
| Region | United States |
| Scanner Type | None |
| Service Type | 1-year warranty |
| Supported Media | Die cut labels, Continuous labels, Notch-index tags |
| Technology | Direct thermal / thermal transfer |
| Type | Label printer |
| Weight | 18.14 |
| Width | 33.6 |
| Wired/wireless | Wireless, Wired |
