QLN420 Mobile Barcode Printer

Q1. What is the Zebra QLn420 mobile printer best suited for?

The Zebra QLn420 is a 4‑inch direct thermal mobile label and receipt printer designed for on‑the‑go barcode printing in warehousing, retail, logistics, and healthcare. It is ideal for shelf‑edge labeling, pick‑ticket printing, pallet labels, and in‑aisle markdowns where staff need reliable wireless printing at the point of work.

Q2. What print width and resolution does the QLn420 support?

The QLn420 offers a print width of up to 4.1 inch (104 mm), making it suitable for standard 4‑inch barcode labels and shipping labels. It uses direct thermal technology at 203 dpi resolution, delivering clear barcodes, text, and graphics without requiring a ribbon.

Q3. Which connectivity options are available on the QLn420?

The QLn420 supports USB, Wi‑Fi (WLAN), Bluetooth, and optional Ethernet via docking solutions, enabling flexible integration with mobile computers, tablets, and host systems. It is Apple iOS certified and also works with Android and Windows devices, making it easy to pair with a wide range of enterprise handhelds.

Q4. How durable and rugged is the QLn420 in daily operations?

The QLn420 features over‑molding, a robust housing, and an optional soft case that can increase protection to IP54 against dust and moisture. It is designed to tolerate multiple drops from around 6 feet to concrete, making it suitable for demanding warehouse and field environments.

Q5. What is the battery capacity and expected runtime of the QLn420?

The printer uses a high‑capacity PowerPrecision Plus removable lithium‑ion battery around 4900–5000 mAh, supporting full‑shift mobile printing depending on print volume and wireless usage. Intelligent battery technology provides status and health data, helping you manage charging cycles and reduce downtime.

Q6. What media types and sizes can the QLn420 print on?

The QLn420 can handle direct thermal labels and receipts with a maximum media width of about 4.1 inch and media roll outer diameter of around 2.6 inch. It supports gap and black‑mark sensing, enabling a variety of label formats for barcodes, shipping, and asset tags.