Zebra ZD421D Label Printer-Direct Thermal Printer
Zebra ZD421D is a powerful, compact direct thermal label printer for businesses needing reliable, high-quality label printing for retail, healthcare, or logistics, that offer advanced connectivity (USB, Ethernet, Wi-Fi, Bluetooth), user-friendly 5-LED interface, Print DNA software, and future-ready features with an innovative architecture and optional modules like cutters or peelers. It replaces older models (GK/ZD420), provides fast performance, and uses thermal paper (no ink/ribbon needed), making it efficient for shipping labels, tags, and receipts.
Key Specifications
| Feature | Specification |
| Print Technology | Direct Thermal (no ribbons required) |
| Resolution | 203 dpi (dots per inch) standard; 300 dpi optional |
| Maximum Print Width | 4.09 inches (104 mm) |
| Maximum Print Speed | Up to 6 inches (152 mm) per second |
| Connectivity | Standard: USB 2.0, USB Host, Bluetooth Low Energy (BLE) Optional: Ethernet, Serial, Wi-Fi |
| Media Handling | Roll-fed or fanfold; supports labels, receipts, tags, wristbands |
| Media Width | 0.585 inches to 4.65 inches (15 mm to 118 mm) |
| Memory | 512 MB Flash, 256 MB SDRAM |
| Dimensions | 8.69″ L x 6.98″ W x 5.93″ H (221 mm x 177 mm x 151 mm) |
| Weight | Approx. 3.5 lbs (1.6 kg) |
Features and Benefits
- No Ink/Toner Needed: Utilizes direct thermal technology, which uses heat-sensitive media to produce prints, eliminating the ongoing cost and maintenance of ribbons or toner.
- User-Friendly Design: Features a 5-LED icon, 3-button interface for easy operation and status monitoring, and an OpenACCESS™ clamshell design for quick media loading.
- Versatile Media Handling: The movable media sensor accommodates a wide variety of label sizes and types, including receipt paper, tags, and wristbands.
- Enhanced Connectivity: Standard USB and Bluetooth LE connectivity, with optional Ethernet and Wi-Fi upgrades available to seamlessly integrate into most business environments.
- Durable and Reliable: Built with a dual-wall frame construction for durability and designed for reliable, medium-volume performance in demanding environments like retail and healthcare.
- Advanced Security: Comes with Zebra’s PrintSecure technology (part of the Print DNA software suite) to protect sensitive data and prevent cyberattacks.
Popular brands we offer
- Brother: Known for P-Touch (PT-D200, PT-E110VP) for office/home and QL series (QL-800) for fast, versatile printing.
- Zebra: Dominant in industrial and barcode printing with models like the GK420t (desktop) and ZT411 (industrial).
- Bixolon: Strong in point-of-sale (POS) and retail with models like SLP-DX220 and XD3/XD5 series.
Where to buy
Buy the Brother QL-820NWB label printer online in Kenya from Tdk Solutions Limited, the trusted Brother label printer Kenya store in Nairobi CBD, where we offer same-day delivery on available in-house stock and provide discounts on compatible sticker labels and rolls




