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Product Code: PTHO-030
MPN #: ZD4A042-D0EE00EZ
Many small businesses and busy workstations need fast, reliable labels but often end up with slow or jam-prone printers. When a printer stops, the whole workflow stalls, causing missed shipments and unhappy customers. The Zebra ZD421 solves this by delivering quick, direct-thermal printing with built-in security, so you can keep moving without worrying about downtime.
Meet the printer that turns label chaos into smooth operation. This compact 4-inch Zebra model prints at 152 mm per second with crisp 203 203 dpi quality. It is built for environments where speed and accuracy matter, from retail checkout lanes to warehouse packing stations. If you have been frustrated by missed scans or blurry tags, this printer gives you the speed and reliability you need to stay ahead.
| Printing | |
| Maximum printing width | 10.4 cm |
| Print speed | 152 mm/sec |
| Print speed | 152 mm/sec |
| Print speed | 152 mm/sec |
| Number of printable dots | 8 dot |
| Maximum resolution | 203 x 203 DPI |
| Print technology | Direct thermal |
| Paper handling | |
| Maximum label length | 0.991 m |
| Maximum roll diameter | 12.7 cm |
| Media thickness | 0.08 - 0.19 mm |
| Ports & interfaces | |
| USB 2.0 ports quantity | 1 |
| USB port | Yes |
| Bluetooth Low Energy (BLE) | Yes |
| Bluetooth version | 5.0 |
| Bluetooth | Yes |
| Wi-Fi | No |
| Ethernet LAN | Yes |
| Connectivity technology | Wired & Wireless |
| Performance | |
| Flash memory | 512 MB |
| Internal memory | 256 MB |
| Page description languages | EPL2, XML, ZBI, ZPL II |
| Design | |
| Display | LCD |
| Built-in display | Yes |
| Product colour | Grey |
| Power | |
| AC input frequency | 50-60 Hz |
| AC input voltage | 100 - 240 V |
| System requirements | |
| Mobile operating systems supported | Android, iOS |
| Windows operating systems supported | Yes |
| Operational conditions | |
| Operating temperature (T-T) | 4.4 - 41 °C |
| Operating temperature (T-T) | 4.4 - 41 °C |
| Storage temperature (T-T) | -40 - 60 °C |
| Storage temperature (T-T) | -40 - 60 °C |
| Storage relative humidity (H-H) | 5 - 95% |
| Operating relative humidity (H-H) | 10 - 90% |
| Weight & dimensions | |
| Weight | 1.35 kg |
| Height | 150.7 mm |
| Depth | 220.8 mm |
| Width | 177.5 mm |
| Other features | |
| Maximum resolution | 203 x 203 DPI |
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We are retiring PICOPC Products MNHO-073, MNHO-048 and MNHO-043 and they have reached EOL (End Of Life) as we are introducing new products with better technology. We would recommend you to look into MNHO-095. For Untangle, pfSense, OPNsense, Windows 11, Proxmox VE etc. we recommend MNHO-095 whereas for Sophos, Kerio Control and Endian, we would recommend MNHO-069. (A complete list of supported OS can be found in each product's listing)