Einführung
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your vretti Bluetooth Thermal Shipping Label Printer, Model 420B. Please read this guide thoroughly to ensure proper use and optimal performance of your device.
Produkt überview
The vretti 420B is a compact and efficient thermal label printer designed for various labeling needs. It supports both wired (USB) and wireless (Bluetooth) connectivity, offering flexibility for different operating environments.
Hauptmerkmale:
- Bluetooth-Konnektivität: Print wirelessly from Android, iPhone, iPad, and Windows devices. (Note: Mac OS devices are not supported via Bluetooth).
- Hochgeschwindigkeitsdruck: Capable of printing up to 75 labels per minute (152mm/s) at 203 dpi resolution for clear black and white text and images.
- Versatile Media Support: Compatible with various thermal direct label types including Continuous, Gap, Black Mark, Fan-Fold, and Punched Hole.
- Adjustable Label Sizes: Supports label widths from 25.4mm to 115mm (0.78 to 4.6 inches), accommodating shipping labels, address labels, barcode labels, and more.
- Kompatibilität mehrerer Plattformen: Works with major transportation and e-commerce platforms such as UPS, eBay, Amazon, Shopify, FedEx, DHL, and Uber Eats. Compatible with Windows, Mac OS, and Linux systems via USB.
- Ink-Free Thermal Printing: Utilizes thermal printing technology, eliminating the need for ink cartridges or toner.
- Automatische Etikettenerkennung: Features auto label detection and error reprint technology for high-precision printing.
- Eingebauter Etikettenbehälter: Designed with an internal label bin, removing the need for an external label holder.
Aufstellen
1. Auspacken und Komponenten
Carefully unpack the printer and verify that all components are present:
- vretti 420B Thermal Label Printer
- Netzteil und Netzkabel
- USB-Kabel
- Kurzanleitung
- Sicherheitsleitfaden
- Sample Etiketten
- USB Adapter for Mac (if included)

Image: The vretti 420B printer shown with its power adapter, USB cable, and sample labels, illustrating the complete package contents.
2. Physische Verbindung
- Schließen Sie das Netzteil an den Stromanschluss des Druckers an.
- Stecken Sie das Netzkabel in eine Wandsteckdose.
- For USB connection, connect one end of the USB cable to the printer and the other end to your computer.
- Schalten Sie den Drucker mit dem Netzschalter auf der Rückseite ein.

Image: The vretti 420B printer connected to a laptop, demonstrating the USB connection setup.
3. Driver Installation (for USB Printing)
For Windows, Mac OS, or Linux systems, download the appropriate driver from the official vretti webFolgen Sie den Anweisungen auf dem Bildschirm, um die Installation abzuschließen.
- Visit the vretti label printers official webWebsite.
- Locate and download the driver for Model 420B compatible with your operating system.
- Führen Sie das Installationsprogramm aus und folgen Sie den Anweisungen.
4. Mobile App Installation (for Bluetooth Printing)
For printing from Android, iPhone, or iPad devices via Bluetooth, install the dedicated mobile application:
- Für Android: Suchen nach "4barcode Edit" in the Google Play Store.
- Für iPhone/iPad: Suchen nach "4barlabel" in the Apple App Store.
- Installieren Sie die App auf Ihrem Gerät.

Image: A smartphone screen showing the "4barcode" app available on Google Play and the App Store, with the vretti printer connected wirelessly.
Bedienungsanleitung
1. Etiketten einlegen
- Öffnen Sie die Druckerabdeckung.
- Passen Sie die verschiebbaren Führungsschienen an die Breite Ihrer Etiketten an.
- Insert the thermal labels into the printer with the printable side facing up. Ensure the labels are fed smoothly and correctly.
- Schließen Sie die Druckerabdeckung. Der Drucker erkennt und kalibriert die Etikettengröße automatisch.

Image: Hands loading fan-fold labels into the vretti 420B printer, highlighting the adjustable guides for different label widths.
2. Printing via USB (Windows/Mac/Linux)
- Ensure the printer is connected to your computer via USB and the driver is installed.
- Öffnen Sie das Dokument oder Bild, das Sie drucken möchten.
- Select the vretti 420B printer from your printer options.
- Adjust print settings (e.g., label size, orientation, copies) as needed.
- Starten Sie den Druckauftrag.
3. Printing via Bluetooth (Android/iPhone/iPad)
- Stellen Sie sicher, dass Bluetooth auf Ihrem Mobilgerät aktiviert ist.
- Open the "4barcode Edit" (Android) or "4barlabel" (iOS) app.
- Within the app, connect to your vretti 420B printer via Bluetooth.
- Select the type of content you want to print (e.g., PDF, image, custom label).
- Customize your label using the app's editing features (text, icons, images, barcodes, QR codes).
- Adjust print settings (e.g., width/height, copies, print quality, print speed).
- Tippen Sie auf „Drucken“, um den Auftrag an den Drucker zu senden.

Image: The vretti 420B printer in action, producing a shipping label, while a smartphone shows the connected mobile application.
4. Etiketten anpassen
The mobile application provides extensive customization options:
- Text: Add and format text with various fonts, sizes, and styles.
- Icons/Images: Insert pre-loaded icons or upload your own images.
- Barcodes/QR-Codes: Generieren und drucken Sie Standard-Barcodes und QR-Codes.
- Vorlagen: Utilize pre-designed templates for common label types (e.g., address labels, product labels, thank you stickers).

Image: A display of diverse labels printed by the vretti 420B, showcasing its versatility for different shapes and purposes.
Wartung
Regelmäßige Wartung gewährleistet die Langlebigkeit und optimale Leistung Ihres Druckers.
- Reinigen des Druckkopfes: Use an alcohol wipe to gently clean the print head if print quality degrades or lines appear. Ensure the printer is off and cooled down before cleaning.
- Reinigung der Walzenplatte: Regularly clean the rubber roller to prevent dust and adhesive residue buildup, which can affect feeding.
- Lagerung: Lagern Sie den Drucker in einer sauberen, trockenen Umgebung, fern von direkter Sonneneinstrahlung und extremen Temperaturen.
- Etikettenqualität: Verwenden Sie hochwertige Thermotransferetiketten, um Beschädigungen des Druckkopfes zu vermeiden und klare Ausdrucke zu gewährleisten.
Fehlerbehebung
Hier finden Sie Lösungen für häufig auftretende Probleme:
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Blank Labels | Labels loaded incorrectly (printable side down). | Ensure thermal labels are placed with the printed side facing up. |
| Poor Print Quality (faint/unscannable) | Low print density, dirty print head, or low-quality labels. | Increase print density in settings. Clean the print head with an alcohol wipe. Use recommended thermal labels. |
| Drucker reagiert nicht | Loose cable connection, incorrect driver, or Bluetooth not paired. | Check all cable connections. Reinstall printer driver. Ensure Bluetooth is correctly paired in the app. |
| Etiketten werden nicht richtig zugeführt | Incorrect label size setting, misaligned guides, or label jam. | Verify label size settings in the app/driver. Adjust label guides. Clear any jammed labels. |
Technische Daten
- Modell: Nr. 420B
- Marke: vretti
- Drucktechnologie: Thermal
- Konnektivität: Bluetooth, USB
- Druckauflösung: 203 dpi (Schwarzweiß)
- Maximale Druckgeschwindigkeit (Monochrom): 72 labels/minute (152mm/s)
- Maximale Mediengröße: 4 x 6 Zoll
- Unterstützte Etikettenbreite: 25.4 mm - 115 mm (0.78 - 4.6 Zoll)
- Produktabmessungen: 21 x 17 x 15 cm; 2.09 kg
- Besondere Merkmale: High Speed Printing, Adjustable Width, Versatile Media Support, Multi-Platform Compatibility, Automatic Label Detection.
Garantie und Support
For warranty information or technical assistance, please refer to the contact details provided in your Quick Start Guide or visit the official vretti website. Ensure you have your product model number (420B) and purchase details ready when contacting support.
Kontaktinformationen:
- E-Mail: support@vretti.com
- WebWebsite: www.vretti.com





