1. Introducció
The ELRO ARD51 Electronic Guard Dog is designed to enhance your home security by deterring potential intruders with realistic dog barking sounds. Utilizing advanced radar technology, this device detects movement through walls, doors, and windows, providing an effective and discreet security solution. It offers multiple sound options, including barking, an alarm, and a doorbell chime, with adjustable volume and detection range.

Image 1: The ELRO ARD51 Electronic Guard Dog unit.
2. Informació de seguretat
- Llegiu atentament totes les instruccions abans d'utilitzar.
- No exposeu el dispositiu a l'aigua ni a una humitat excessiva.
- Use only the provided power adapter or specified batteries (8 x 1.5V AA).
- Mantingueu el dispositiu fora de l'abast dels nens.
- The device can produce sounds up to 120 dB. Avoid prolonged exposure to high volume levels to prevent hearing damage.
- No intenteu obrir ni reparar el dispositiu vosaltres mateixos. Encarregueu totes les tasques de manteniment a personal qualificat.
3. Contingut del paquet
Si us plau, comproveu que tots els elements siguin presents al paquet:
- 1 x ELRO ARD51 Electronic Guard Dog Unit
- 1 x Power Adapter (1.5m cable)
- 1 x Security Sticker
- 1 x manual d'instruccions
Note: 8 x 1.5V AA batteries are not included and must be purchased separately if battery operation is desired.
4. Configuració
4.1 Alimentació del dispositiu
The ELRO ARD51 can be powered by either the included AC adapter or 8 AA batteries.
- Ús de l'adaptador de CA: Plug the small end of the adapter into the DC 12V input port on the back of the unit. Plug the other end into a standard wall outlet.
- Ús de piles: Open the battery compartment on the back of the unit. Insert 8 x 1.5V AA batteries, ensuring correct polarity (+/-). Close the battery compartment securely.

Imatge 2: posterior view of the ELRO ARD51, illustrating the battery compartment and power adapter connection.
4.2 Col·locació
For optimal performance, place the ELRO ARD51 in a discreet location near an exterior wall or door that you wish to monitor. The radar sensor can detect movement through various materials, including wood, concrete, and plastic, up to 18 cm thick.
- Position the unit where its detection field covers the desired area.
- Avoid placing it directly behind large metal objects, which may interfere with radar detection.

Imatge 3: Ex.ample placement of the ELRO ARD51 in a home entryway.
4.3 Applying the Security Sticker
The included security sticker can be placed on a window or door to visually deter potential intruders, indicating the presence of a guard dog.
5. Funcionament del dispositiu
5.1 Encès/Apagat
Premeu el botó On/Off button located on the top of the unit to power the device on or off.
5.2 Selecting Sound Mode
The ELRO ARD51 offers three distinct sound modes:
- Barking Dog: Realistic 3D dog barking sound to simulate a guard dog.
- Alarma: A loud siren sound for general security alerts.
- Doorbell (Ding-dong): A chime sound, useful for welcoming visitors in a retail or office setting.
Utilitza el Seleccioneu button on the top panel to cycle through these sound modes.
5.3 Ajust del volum
The volume can be adjusted from 70 dB to a maximum of 120 dB. Use the Vol+ i tornar buttons on the top panel to increase or decrease the sound level.
5.4 Adjusting Detection Range
The radar sensor's detection range is adjustable from approximately 9 to 16 meters. A switch inside the battery compartment allows you to set the sensitivity:
- Alt: Maximum detection range.
- Mitjà: Medium detection range.
- Baix: Minimum detection range.
To adjust, open the battery compartment and slide the switch to your desired setting.

Image 4: Range adjustment switch (High, Mid, Low) located within the battery compartment.

Image 5: Visual representation of the radar detection range at different settings.
6. Manteniment
- Neteja: Netegeu el dispositiu amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Substitució de la bateria: If using batteries, replace all 8 AA batteries simultaneously when the power indicator light dims or the device's performance decreases. Do not mix old and new batteries or different types of batteries.
- Emmagatzematge: Si guardeu el dispositiu durant un període prolongat, traieu-ne les piles per evitar fuites. Guardeu-lo en un lloc fresc i sec.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El dispositiu no s'encén. | No power, incorrect battery installation, or dead batteries. | Check AC adapter connection. If using batteries, ensure they are inserted correctly and are not depleted. Replace batteries if necessary. |
| Cap so o so fluix. | El volum s'ha definit massa baix. | Increase the volume using the Vol+ button. |
| El sensor no detecta moviment. | Range setting too low, or obstruction. | Adjust the range switch to 'Mid' or 'High'. Ensure the unit is not behind extremely dense or metallic objects. |
| Falses alarmes. | Range setting too high, or environmental factors. | Adjust the range switch to 'Low' or 'Mid'. Reposition the unit to avoid detecting unwanted movement (e.g., from outside a property boundary). |
8. Especificacions
- Model: ARD51
- Marca: ELRO
- Voltage: 2.4 Volts (battery operation)
- Mètode de control: Pulsador
- Nivell de so màxim: 120 decibels
- Tipus de muntatge: Muntatge de paret
- Interval màxim de detecció: 16 metres
- Tecnologia del sensor: Sensor de radar
- Fabricant: ELRO Europa
- Dimensions del producte (L x A x A): 15.2 x 10.2 x 15 cm
- Pes: 1.04 quilos
- Font d'alimentació: AC/DC (Adapter included), 8 x 1.5V AA Alkaline Batteries (not included)
9. Informació de la garantia
For detailed warranty terms and conditions, please refer to the official ELRO website or the warranty documentation included with your purchase. Keep your proof of purchase for any warranty claims.
10. Atenció al client
Should you require technical assistance, have questions about your ELRO ARD51, or need further support, please visit the official ELRO website or contact their customer service department. Contact details can typically be found on the ELRO weblloc o a l'embalatge del producte.





