Product Overview
The AVANTEK CB-21 Wireless Doorbell system provides a reliable and convenient solution for your home or office. It features a long wireless range, multiple melodies, adjustable volume levels, and a durable, waterproof design.

Image: The AVANTEK CB-21 Wireless Doorbell kit, showing one plug-in receiver and two wireless push-button transmitters.
E caratteristiche chjave includenu:
- 1,000 FT/300 M Long Wireless Range: Ensures you never miss a visitor, even if you are a few rooms away or on another floor.
- 52 Melodies & 5 Volume Levels: Tailor your doorbell experience with a wide selection of tunes and adjustable volume up to 115 dB.
- IP55 Resistente à a polvere è à l'acqua: The transmitter is designed to withstand various harsh weather conditions, operating between -4 °F to 140 °F.
- Funzione di memoria: Remembers your last melody and volume level after a power outage, eliminating the need to reset settings.
- Installazione faciule: Can be fixed to the wall using included screws and anchors or double-sided adhesive pads.
- Long Life Battery: The transmitter uses a lithium battery with a 3-year maximum lifespan.
Installazione è installazione
Follow these steps to set up your AVANTEK Wireless Doorbell:
- Unpack Components: Ensure all components are present: 1 plug-in receiver, 2 transmitters, 2 adhesive tapes, 1 screwdriver, 4 screws, and 4 anchors.
- Placement du récepteur : Plug the receiver into a standard electrical outlet in a central location within your home.
- Transmitter Battery Activation: Before mounting the transmitter, open its casing to remove the battery insulating strip. This activates the pre-installed lithium battery.

Image: Illustration demonstrating the process of opening the transmitter to remove the battery insulating strip, which is crucial for initial power-up.
- Muntà u trasmettitore: Scegli unu di i metudi seguenti:
- Solution A (Adhesive Tape): Clean the mounting surface thoroughly. Peel off one side of the double-sided adhesive tape and stick it to the back of the transmitter. Peel off the other side and firmly press the transmitter onto the desired location (e.g., door frame or wall) for at least 30 seconds.
- Soluzione B (Viti è Ancore): Use the provided screws and anchors for a more secure installation. Mark the desired drilling points, drill pilot holes, insert the anchors, and then screw the transmitter into place.

Image: Visual guide for installing the doorbell transmitter using either double-sided adhesive or screws and anchors.
Istruzzioni di funziunamentu
The AVANTEK Wireless Doorbell is designed for simple operation:
- Cambiamentu di melodie:
The receiver offers 52 different melodies. To cycle through them, press the "Music Selection" button on the side of the receiver. Press the button repeatedly until you find your desired tune.

Image: The doorbell receiver highlighting its features: 52 selectable chimes and tunes, 5 adjustable volume levels, and an LED indicator for visual alerts.
- Ajustamentu di u voluminu:
There are 5 adjustable volume levels, with a maximum setting of 115 dB. Press the "Volume Control" button on the side of the receiver to increase or decrease the volume to your preference.
- Pairing Transmitters (Custom Tones):
You can set a different ring tone for each transmitter, allowing you to distinguish which doorbell has been rung (e.g., front door vs. back door). To do this:
- Select your desired melody on the receiver.
- Press and hold the "Volume Control" button on the receiver for approximately 5 seconds until the LED indicator flashes rapidly. This indicates pairing mode.
- Immediately press the button on the transmitter you wish to pair with this melody. The receiver will chime once to confirm successful pairing.
- Repeat for other transmitters with different melodies if desired.

Image: Demonstrates how different ring tones can be assigned to individual transmitters, allowing users to differentiate between multiple entry points.
- Funzione di memoria:
The doorbell system is equipped with a memory function. In case of a power outage, your last selected melody and volume level will be remembered, and you will not need to reset them.
Mantenimentu
- Rimpiazzamentu di a batteria (trasmettitore):
The transmitter uses a CR2032 lithium battery with an average lifespan of 3 years. When the transmitter's LED indicator no longer flashes or the range decreases significantly, it's time to replace the battery.
- Aprite cù cura u trasmettitore casing using a small flat-head screwdriver or the provided tool by inserting it into the small notch on the side and gently prying it open.
- Locate the coin cell battery (CR2032).
- Gently pry out the old battery.
- Inserite una nova batteria CR2032 cù u latu pusitivu (+) rivoltu in sopra.
- Snap the transmitter casinrimettite inseme in modu sicuru.
- Pulizia:
Wipe the doorbell receiver and transmitter with a soft, dry cloth. Do not use abrasive cleaners or solvents, as these may damage the finish or internal components. The transmitter is IP55 dustproof and waterproof, but avoid submerging it in water.

Image: The doorbell transmitter shown in a wet environment, illustrating its IP55 dustproof and waterproof capabilities, suitable for outdoor use.
Risoluzione di prublemi
| Prublemu | Causa Possibile | Soluzione |
|---|---|---|
| U campanile ùn sona micca. |
|
|
| Corta portata wireless. |
|
|
| U LED di u ricevitore lampeghja ma ùn ci hè micca sonu. | Volume is set to mute (0 dB). | Press the "Volume Control" button to increase the volume. |
Specificazioni di u produttu
| Feature | Detail |
|---|---|
| Numero di mudellu | CB-21 |
| Range Wireless | 1,000 ft / 300 m (open air) |
| Melodie | 52 |
| Livelli di volumi | 5 (finu à 115 dB) |
| Batteria di trasmettitore | CR2032 Lithium Battery (3V) |
| Fonte di energia di u ricevitore | AC & Battery (Plug-in) |
| Classificazione Impermeabilità (Trasmettitore) | IP55 |
| Temperature di funziunamentu | -4 °F à 140 °F (-20 °C à 60 °C) |
| Materiale | ABS |
| Dimensioni (Ricevitore) | Circa. 2.87 x 0.6 x 3.15 inch |
| Dimensioni (trasmettitore) | Circa. 1.57 x 0.6 x 3 inch |
| Cumpunenti inclusi | 1 Receiver, 2 Transmitters, 2 Adhesive Tapes, 1 Screwdriver, 4 Screws, 4 Anchors, 1 User Manual |

Image: Detailed dimensions of the compact receiver and transmitter units, showing they are designed not to obstruct adjacent power sockets.
Garanzia è Supportu
AVANTEK is committed to delivering top-notch products and customer satisfaction. Our wireless doorbell is approved by FCC, CE, and RoHS standards.
For any inquiries, technical support, or warranty claims, please refer to the official AVANTEK customer service channels. You can also find additional resources and product information by visiting the official AVANTEK store:
Un manuale d'usu cumpletu in furmatu PDF hè ancu dispunibule per scaricamentu: Scaricà u Manuale d'Usu (PDF)





