Introducció
This manual provides detailed instructions for the setup, operation, and maintenance of your NIIMBOT B21 PRO Thermal Label Printer. Please read this manual thoroughly before using the device to ensure optimal performance and longevity. The NIIMBOT B21 PRO is a 300DPI portable thermal label printer designed for various labeling needs, offering inkless printing, Bluetooth connectivity, and PC compatibility.
Configuració
1. Llista d'embalatge
En desempaquetar, assegureu-vos que hi hagi tots els elements següents:
- B21 Label Maker x1
- Roll Label Paper x1 (50x30mm, 230pcs/Roll)
- Cable de càrrega x1 (Tipus C)
- Manual d'usuari x1
- Caixa d'embalatge x1

Image: The packaging box contents, including the printer, label roll, charging cable, and user manual, alongside a specifications list.
2. Càrrega de paper d'etiquetes
To load the label paper:
- Open the printer cover using the compact opening rocker located on the side of the device.
- Insert the label roll into the compartment. Ensure the printing side of the label paper is facing upwards and the leading edge extends slightly out of the printer slot.
- Tanqueu la tapa fermament fins que encaixi al seu lloc.

Image: A green NIIMBOT B21 PRO printer with its lid open, revealing a label roll correctly inserted inside.
3. Càrrega del dispositiu
The B21 PRO has a built-in rechargeable battery. Connect the provided Type-C charging cable to the printer's charging port and a suitable USB power source (e.g., wall adapter, computer USB port). The indicator light on the printer will show the charging status.
4. Instal·lació de l'aplicació
To use the printer with your smartphone:
- Download the 'NIIMBOT' app from the Apple App Store (for iOS devices) or Google Play Store (for Android devices).
- Instal·leu l'aplicació al vostre telèfon intel·ligent.

Image: A smartphone displaying the NIIMBOT app available for download on both the App Store and Google Play.
5. Emparellament Bluetooth
To connect your printer to your smartphone via Bluetooth:
- Assegureu-vos que la impressora estigui engegada.
- Activa el Bluetooth al teu telèfon intel·ligent.
- Open the NIIMBOT app. The app will automatically search for nearby NIIMBOT devices.
- Select your B21 PRO printer from the list of available devices to pair. The app will guide you through the connection process.

Image: A NIIMBOT B21 PRO printer shown connected to a smartphone via Bluetooth and a laptop via a USB cable, illustrating both connection methods.
6. Connexió a l'ordinador (USB)
For PC connection:
- Download the appropriate printer driver from the official NIIMBOT weblloc.
- Connect the printer to your PC using a USB cable.
Nota: This printer is compatible with Windows OS but not with Mac OS or iPad.

Image: A NIIMBOT B21 PRO printer connected to a laptop via a USB-C cable, with icons indicating compatibility with Windows but not Mac OS.
Instruccions de funcionament
1. Basic Printing Steps
Printing a label is a simple three-step process:
- Put Paper: Load the label paper into the printer as described in the Setup section.
- Pair the Bluetooth: Connect your smartphone to the printer via Bluetooth using the NIIMBOT app.
- Edit and Print: Use the NIIMBOT app to design your label and send the print command.

Image: A visual representation of the three easy steps to print: loading paper, pairing via Bluetooth, and editing/printing from the app.
2. Customizing Labels with the NIIMBOT App
The NIIMBOT app provides a powerful interface for creating custom labels:
- Text: Add and format text with various fonts and sizes.
- Icones: Choose from a library of icons to enhance your labels.
- Codis de barres/codis QR: Generate and print 1D or 2D barcodes for product tracking or information.
- Hora: Include current date and time stamps.
- Excel: Utilize the Excel batch printing feature for efficient printing of multiple labels from a spreadsheet.
- Imatge/Fotografia: Insert images or photos onto your labels.
- Frontera: Add decorative borders to your label designs.

Image: A smartphone screen displaying the NIIMBOT app's interface for customizing labels, showing options for text, icons, barcodes, QR codes, images, time, and borders.
3. Tipus i mides d'etiquetes compatibles
The B21 PRO supports a wide range of thermal labels with widths from 20mm to 50mm. This includes white, round, colored, and transparent labels, allowing for diverse applications.

Image: An assortment of label rolls in different sizes and shapes, demonstrating the printer's versatility in handling various label types.
4. Aplicacions
The NIIMBOT B21 PRO is suitable for numerous labeling tasks:
- Gestió de la llar: Organize items in your home, pantry, or storage.
- Petita empresa: Crear preu tags, ingredient labels, product tags, and clothing labels.
- Ús personal: Label personal belongings, craft supplies, or gifts.
- Etiquetes d'adreça: Print clear and professional address labels for mailing.

Imatge: Examples of printed labels applied to clothing, an envelope for an address, jewelry, and a product bottle, showcasing aplicacions diverses.
Video: Demonstration of the NIIMBOT B21 printer creating various labels for business and home use, including ingredient labels, price tags, and organization labels. The video also highlights the labels' waterproof, oil-proof, scratch, and tear-resistant properties.
Manteniment
1. Neteja del capçal d'impressió
To ensure consistent, high-quality prints, regularly clean the print head. Turn off the printer and allow it to cool. Gently wipe the print head with a soft, lint-free cloth moistened with isopropyl alcohol. Avoid touching the print head with bare hands.
2. Label Storage
Store thermal labels in a cool, dry place away from direct sunlight, heat, and harsh chemicals. Improper storage can cause labels to fade or become unusable.
3. Cura de la bateria
To prolong the life of the built-in rechargeable battery, avoid fully discharging it frequently. Charge the device regularly, even if it's not in use for extended periods. Store the printer in a cool, dry place when not in use.
Resolució de problemes
Problemes comuns i solucions:
- No Print or Faint Print:
- Ensure the label paper is loaded correctly with the printing side facing up.
- Check if the print head is clean. Refer to the 'Cleaning the Print Head' section.
- Verify that you are using genuine thermal label paper.
- Connection Issues (Bluetooth/PC):
- Ensure Bluetooth is enabled on your device and the printer is powered on.
- Restart both the printer and your smartphone/PC.
- For Bluetooth, try unpairing and re-pairing the device in the NIIMBOT app.
- For PC, ensure the correct driver is installed and the USB cable is securely connected.
- Label Not Identified:
- The printer's intelligent identification system works best with compatible NIIMBOT labels. Ensure you are using genuine labels.
- Check for any obstructions in the label path that might prevent proper sensing.
- Embussos de paper:
- Apagueu la impressora immediatament.
- Carefully open the printer cover and remove any jammed label paper.
- Ensure the label roll is inserted correctly and not too tightly, allowing it to feed smoothly.
Especificacions
| Característica | Especificació |
|---|---|
| Nom de marca | NiiMbot |
| Model | B21 PRO |
| Tipus | Thermal Printer, Label Maker |
| Mètode d'impressió | Thermal Inkless |
| Màx. Resolució | 300 ppp |
| Velocitat d'impressió | Màxim 50 mm/s |
| Mida màxima del paper | 50MM Width (supports 20-50mm width labels) |
| Tipus de consumibles | Paper d’etiquetes |
| Tipus d'interfície | Bluetooth, USB (Wired for PC) |
| Tipus de connexió de senyal | Bluetooth |
| Bateria inclosa | Yes (1500mAh Large cell) |
| Voltage | 100-240V |
| Mode d'alimentació de paper | Manual |
| Mida de la impressora | 5" x 3.7" x 2.4" |
| Pes | 0.6 lliures |
| Origen | Xina continental |
Consells per a l'usuari
- For the best print quality and to ensure proper label identification, always use genuine NIIMBOT thermal labels.
- Avançanttage of the wide variety of templates available in the NIIMBOT app to quickly create professional and aesthetically pleasing labels for different purposes.
- If you need to print many similar labels, utilize the Excel batch printing feature in the app to save time and improve efficiency.
- Regularly clean the print head as instructed in the maintenance section to prevent smudges and maintain clear, crisp print quality.
- When designing labels, consider the waterproof, oil-proof, scratch, and tear-resistant properties of the labels for applications in kitchens, bathrooms, or retail environments.
Garantia i Suport
For detailed warranty information, technical support, and customer service, please refer to the official NIIMBOT website or contact their authorized support channels. Keep your purchase receipt as proof of purchase for any warranty claims.





