Comparison
Zebra ZQ320 Plus vs ZQ521: 3-inch or 4-inch mobile printer
Light 3-inch receipt printer or rugged 4-inch label printer? Print width, media, battery, connectivity and durability of the ZQ320 Plus and ZQ521 side by side.
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In this guide
Both are Zebra direct thermal mobile printers for receipts and labels, with Bluetooth, NFC tap-to-pair and Zebra's Link-OS. The ZQ320 Plus is the light, slim 3-inch model for receipts on the move. The ZQ521 is the rugged 4-inch model: it prints 104 mm wide, takes more media types, has a bigger battery and a display, and is built to survive more drops. Choose the ZQ320 Plus for receipts and small labels on a belt all day. Choose the ZQ521 for 4-inch labels, delivery and warehouse work, or Wi-Fi.
| ZQ320 Plus | ZQ521 | |
|---|---|---|
| Max print width | 72 mm | 104 mm |
| Media width | 80 mm; 76 mm with spacers | 50.8–113 mm |
| Max roll diameter | 40 mm | 57 mm |
| Media types | Receipt paper, linerless labels; labels on the indoor version only | Receipt, gap and black mark labels, tags; linerless and RFID versions |
| Media sensors | Black mark; gap on the indoor version only | Black mark and gap |
| Max print speed | 100 mm/s (4 ips) | 127 mm/s (5 ips) with draft mode |
| Resolution | 203 dpi (8 dots/mm) | Same |
| Battery | 2280 mAh PowerPrecision+ | 3250 mAh PowerPrecision+; 6500 mAh extended option |
| Our version | Bluetooth 4.1 (Classic and Low Energy) | Wi-Fi 802.11ac and Bluetooth 4.1 |
| USB | USB-C | USB 2.0 On-The-Go, Micro-AB |
| NFC Print Touch | Yes | Same |
| Status display | LED icons | LCD with battery and wireless icons |
| Sealing | IP54 | IP54; IP65 with optional exoskeleton case |
| Drop and tumble | 1.5 m drop; 500 tumbles from 1 m | Multiple 2 m drops to concrete; 1300 tumbles from 1 m; MIL-STD 810G |
| Operating temperature | −15 to 50 °C | −20 to 55 °C |
| Size (L × W × H) | 130 × 117.7 × 49.5 mm | 158 × 155 × 67 mm |
| Weight with battery | 0.43 kg | 0.79 kg |
| Memory | 128 MB RAM, 256 MB flash | 256 MB RAM, 512 MB flash |
| Printer languages | CPCL, ZPL | CPCL, ZPL, ZBI 2.x |
| Standard warranty | 1 year | 2 years |
Figures from Zebra's ZQ300 Plus Series and ZQ511/ZQ521 spec sheets; speeds are maximums. Zebra's ZQ320 Plus user guide lists die-cut (gap) labels only for the indoor version; our ZQ320 Plus is the outdoor Bluetooth version.
Choose the ZQ320 Plus if
- You print receipts and linerless labels up to 72 mm wide
- Staff carry the printer on a belt for a whole shift and weight matters
- Phones and handhelds print over Bluetooth, for example in mobile point of sale, parking enforcement or meter reading
- You want an affordable printer with Zebra's charging and carrying accessories
Choose the ZQ521 if
- You print 4-inch or die-cut labels, such as shelf-edge, parcel or pallet labels
- Printers get dropped often or work in the cold, as in delivery, warehouse and field service work
- Printers must join your Wi-Fi network as well as pair over Bluetooth
- You print long shifts and want a larger or extended battery
What both printers share
Both run Zebra's Link-OS, understand CPCL and ZPL, and print at 203 dpi by heat, without ribbon. Both have a removable PowerPrecision+ battery, a sleep mode that wakes when a job arrives, Bluetooth Classic and Low Energy, Made for iPhone certification and Zebra Print Touch NFC pairing. The free Zebra Printer Setup Utility app supports both. Our ZQ320 Plus setup guide and pairing guide show how the app works.
Video: Zebra Technologies
Accessories, setup and EU security rules
Batteries, chargers, cradles and cases are not shared. The ZQ320 Plus uses the ZQ300 Plus Series accessories and charges over USB-C. The ZQ521 uses ZQ500 Series accessories such as the 4-slot power station, the vehicle cradle and the exoskeleton case.
Zebra printers with Wi-Fi placed on the EU market from 1 August 2025 follow the EU radio equipment security rules. On our Wi-Fi ZQ521 this means a different setup process with a Protected Mode password that protects some settings. Zebra cannot recover a lost password; the printer then needs a factory reset. Zebra's EU RED FAQ lists printers with Bluetooth only, and no Wi-Fi or Ethernet, as not affected, so our Bluetooth ZQ320 Plus sets up without it. More ZQ320 Plus help is on the ZQ320 Plus guides page.
Frequently asked questions
Can the ZQ320 Plus print 100 mm wide labels?
No. The ZQ320 Plus prints up to 72 mm wide on 80 mm media. For 4-inch labels choose the ZQ521, which prints up to 104 mm wide.
Is the ZQ521 heavier than the ZQ320 Plus?
Yes. With a standard battery the ZQ521 weighs 0.79 kg, the ZQ320 Plus 0.43 kg.
Do the ZQ320 Plus and ZQ521 use the same battery?
No. The ZQ320 Plus uses a 2280 mAh battery and the ZQ521 a 3250 mAh battery, with a 6500 mAh extended option. Chargers and cradles differ too.
Do both printers work with iPhone?
Yes. Both are certified Made for iPhone and connect over Bluetooth. Zebra's Printer Setup Utility for iOS supports both series.
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