1. Introduction
Thank you for choosing the KERUI Plug-in Wireless Doorbell. This manual provides detailed instructions for setting up, operating, and maintaining your new doorbell system. Please read this manual carefully before use to ensure proper function and longevity of the product.
Image: KERUI Wireless Doorbell components: receiver and transmitter.
2. Package Contents
Please check the package for the following items:
- Doorbell receiver
- Transmitter (button)
- Adhesive patch
- User manual (this document)
3. Setup
3.1. Doorbell Receiver Installation
- Plug the doorbell receiver into a standard AC outlet (100-240V AC). The receiver will ring "Dingdong" once, indicating it has entered working mode.
Image: Doorbell receiver plugged into an AC outlet.
3.2. Transmitter Button Installation
- Tear off the protective film from the double-sided adhesive patch.
- Attach the adhesive patch to the back of the doorbell transmitter.
- Stick the transmitter firmly onto your desired location (e.g., door frame). Press and hold for more than 5 seconds to ensure a secure bond.
- Special Note: Avoid installing the transmitter on metal doors as much as possible, as this may affect the wireless transmission distance.
3.3. Pairing (Learning) Process
The doorbell receiver and transmitter are usually pre-paired from the factory. If re-pairing is needed or you are adding more transmitters, follow these steps:
Common Doorbell Button Learning:
- Short press the Set button on the doorbell receiver. The receiver will ring once, then release your hand.
- Within a few seconds, press the button on the doorbell transmitter. The doorbell receiver will emit a "ding dong" sound, indicating successful pairing.
- To exit learning mode, press the Volume button once.
Fixed Play Doorbell Sound Button Learning (Music Memory Function):
This method ensures the accessory always uses the learned song, regardless of subsequent melody changes.
- Long press and hold the Select Song button on the doorbell receiver for 3 seconds. The doorbell receiver will emit a beep, triggering the button to enter learning mode.
- Press the button on the doorbell transmitter. The receiver will emit a melody, indicating successful pairing with music memory function.
- If you want to learn multiple doorbell transmitters, repeat step 2 for each additional transmitter.
- After learning all desired transmitters, press the Volume button once to exit the learning process.
- Test each transmitter to confirm successful pairing.
4. Operation
4.1. Volume Control
Press the Volume button on the side of the doorbell receiver to cycle through 4 adjustable volume levels.
Image: Doorbell receiver with controls for 4 adjustable volume levels and 33 optional songs.
4.2. Melody Selection
Press the Select Song button on the side of the doorbell receiver to cycle through 33 available melodies. The receiver has a memory function and will remember the last selected melody even after a power outage.
Image: A hand pressing the black doorbell transmitter button, with the receiver plugged into a wall socket, indicating normal operation.
Image: A hand pressing the white doorbell transmitter button, with the receiver plugged into a wall socket, indicating normal operation.
4.3. SOS Alarm Function
The doorbell system can also function as an SOS alarm. When the transmitter button is pressed, it can trigger an alarm sound from the receiver. This feature is demonstrated in the product video.
Video: Product demonstration showing setup, melody/volume changes, and the SOS alarm function.
5. Maintenance
5.1. Transmitter Battery Replacement
The transmitter button is powered by a CR2032 button battery. If the transmitter stops working or its range decreases significantly, the battery may need replacement. To replace:
- Carefully open the transmitter casing.
- Remove the old CR2032 battery.
- Insert a new CR2032 battery, ensuring correct polarity (+/-).
- Close the transmitter casing securely.
5.2. Cleaning
To clean the doorbell receiver and transmitter, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the devices in water, as this can damage the electronics.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Doorbell does not ring | Receiver not plugged in or powered off. Transmitter battery is low or dead. Transmitter and receiver are not paired. | Ensure receiver is plugged into a live AC outlet. Replace the CR2032 battery in the transmitter. Perform the pairing process as described in Section 3.3. |
| Short transmission range | Interference from metal objects or other wireless devices. Transmitter battery is low. | Relocate the transmitter away from metal doors or large metal structures. Ensure no strong wireless interference sources are nearby. Replace the CR2032 battery in the transmitter. |
| Cannot change melody or volume | Buttons not pressed correctly. Device malfunction. | Ensure you are pressing the correct Volume or Select Song button firmly. Try a factory reset (Section 3.3). If the issue persists, contact customer support. |
| Doorbell rings unexpectedly | Interference from other wireless devices. Accidental button press. | Try changing the melody or performing a factory reset to clear all pairings and re-pair only your transmitters. |
7.1. Factory Reset
If you experience persistent issues or wish to clear all paired transmitters and settings, perform a factory reset:
- Unplug the doorbell receiver from the AC outlet.
- Press and hold the Volume button on the receiver.
- While holding the Volume button, plug the receiver back into the AC outlet. Continue holding for 3 seconds.
- The doorbell receiver will emit a beep, indicating that all transmitters and detectors have been successfully deleted and settings reset. You will need to re-pair your transmitters after a factory reset.
8. Specifications
| Feature | Receiver | Transmitter |
|---|---|---|
| Working Voltage | AC 100-240V | 3V (CR2032 button battery) |
| Working Current | <100mA | <1mA |
| Wireless Frequency | 433MHz | 433MHz |
| Working Temperature | -10°C ~ 50°C | -10°C ~ 50°C |
| Wireless Distance (Open Area) | 100 meters (approx. 328 ft) | 100 meters (approx. 328 ft) |
| Volume Decibels | 20-100dB (4 levels adjustable) | N/A |
| Size (approx.) | 97x54x48mm (excluding plug) | 79x40x11mm |
Image: Diagram illustrating strong signal and 150m long distance transmission through walls, suitable for large houses.
Image: Examples of different doorbell configurations, including 1 button with 1 or 2 receivers, and 2 buttons with 1 receiver.
9. User Tips
- For optimal performance, ensure the receiver is plugged into a central location within your home to maximize signal coverage.
- When installing the transmitter, consider placing it under a small overhang or in a sheltered spot to protect it from direct heavy rain, although it is designed for outdoor use.
- Experiment with different melodies to find one that is pleasant and easily audible throughout your home.
- If you have multiple transmitters, use the fixed play doorbell sound learning method (Section 3.3) to assign specific melodies to different doors for easy identification.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's policy or contact the KERUI Official Store directly. Keep your purchase receipt as proof of purchase for any warranty claims.
A digital version of this user manual is available for download at the following link: KERUI Wireless Doorbell User Manual (PDF)
11. Safety Information
- Do not attempt to disassemble or repair the device yourself. This may void the warranty and cause damage.
- Keep the device away from water, moisture, and extreme temperatures.
- Ensure the receiver is plugged into a properly grounded outlet.
- Dispose of used batteries according to local regulations.