| Printer Type | Desktop |
| Print Technology | Thermal Transfer |
| Interface | SerialUSBEthernet |
| dpi (dots per inch) | 300dpi |
| Core Size | 1.00 inch |
| Printer Options | Real-Time Clock |
| Max Media Width | 4.0-4.9 inch |
| Printer Language | EZPL |
Zebra ZD621 Printer, Thermal Transfer and Direct Thermal, Desktop, 4.27 Max Print Width, 300 DPI, 6 IPS, USB (2.0)/USB Host/Ethernet/Serial Connectivity, Bluetooth LE 5.0 for Printer Setup (with Android/iOS App), RTC, EZPL - Includes: US Power Cord and Adapter