1 / 7Vretti 420B 4×6 USB Thermal Label Printer
The Vretti 420B is a USB-connected monochrome thermal printer for shipping and other labels up to 4×6 inches. Its built-in holder is claimed to accommodate rolls of up to 500 labels, while the listing identifies USB rather than wireless connectivity.
At a glance
- Direct thermal printing avoids ink or toner, according to the listing.
- USB connection is intended for use with a compatible computer. The feature text names Windows, macOS, Linux and ChromeOS.
- A built-in holder is claimed to take a roll of up to 500 labels and rolls up to 4 inches in outer diameter.
Reference price: £89.99
Price checked: 12 Nov 2026
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Pros and cons
Pros
- The 4×6-inch maximum supported label size suits common parcel and postage-label workflows.
- The built-in roll holder can reduce interruptions for roll changes when using a compatible roll.
- Monochrome thermal output avoids buying ink or toner for label printing.
Cons
- USB-only connectivity excludes direct Bluetooth and Wi-Fi printing, according to the feature text.
- Monochrome output is limited to black-and-white label work.
Technical specifications
18 specifications| Brand | vretti |
|---|---|
| Model | 420B |
| Printing technology | Thermal |
| Output | Monochrome |
| Print media | Labels |
| Resolution | 203DPI |
| Maximum supported paper size | 4 x 6 inches |
| Print functions | Print Only |
| Connection listed | USB |
|---|---|
| Control method listed | App |
| Compatible devices | Laptops, PC |
| Printer languages | TSPL, EPL, ZPL and DPL |
| Built-in holder capacity claim | Built-in label Holder holds a roll of up to 500 labels and supports rolls up to 4 inches in outer diameter, helping reduce the need for frequent roll changes |
|---|---|
| Supported label widths | 1 to 4.5 inches with compatible label media |
| Dimensions (D × W × H) | 21.5D x 17.8W x 15.5H centimetres |
|---|---|
| Weight listed | 1.35 Kilograms |
| Colour | Black |
| Special feature | Portable |
What to know before buying
Listing details to confirm
The listing details are inconsistent: it says the printer is USB-only and has no Bluetooth or Wi-Fi, but also lists App control and Ethernet as a hardware interface. Treat USB as the substantiated connection and confirm the intended control method before purchase. The specification table also gives conflicting print-speed, resolution, duplex, paper-capacity and power figures, so those are not presented as settled specifications. The included 4×6-inch size and supported media widths may require compatible labels.
What’s in the box
Included- Labels
- Power adapter
- Power cord
- Setup guide
- USB cable
Who is it for?
A good fit for
- Small businesses or home shippers who print monochrome parcel labels from a USB-connected computer.
- Buyers who want a built-in roll holder and use compatible thermal labels.
Less suited to
- Anyone needing wireless printing or a confirmed phone-app workflow.
- Anyone needing colour output, general document printing or confirmed automatic duplex printing.
Customer reviews on Amazon
- 5 stars
74% 74% - 4 stars
8% 8% - 3 stars
4% 4% - 2 stars
5% 5% - 1 star
9% 9%
Customer feedback describes setup as straightforward, with reports of quick output and clear monochrome printing. Some customers find its 4×6 label printing suitable, while others report problems with that label format. That mixed experience matters because 4×6 shipping labels are a main intended use, and the listing specifies USB connection and 203 DPI output. Feedback is not a guarantee of performance with every label or computer.
Positive themes
- Customers report easy setup and quick printing.
- Feedback mentions clear output and positive impressions of print appearance.
Mixed feedback
- Feedback on 4×6 label printing is mixed, with some customers finding it suitable and others reporting issues.
Frequently asked questions
Does the Vretti 420B print wirelessly?
The feature description says this model is USB-only and has no Bluetooth or Wi-Fi. The details also list App control, so confirm the intended control method if app-based use matters.
What label sizes does it support?
The listing specifies a maximum supported paper size of 4 x 6 inches and says label widths from 1 to 4.5 inches work with compatible media.
Does it use ink or toner?
The feature description identifies direct thermal printing and says it prints without ink or toner.
How many labels can the built-in holder take?
The listing claims the holder accommodates a roll of up to 500 labels and supports rolls up to 4 inches in outer diameter.
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