1. Introducción
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. Información de seguridad
- Lea atentamente todas las instrucciones antes de usar.
- No exponga el dispositivo al agua ni a la humedad excesiva.
- Use only the provided power adapter or specified batteries (8 x 1.5V AA).
- Mantenga el dispositivo fuera del alcance de los niños.
- The device can produce sounds up to 120 dB. Avoid prolonged exposure to high volume levels to prevent hearing damage.
- No intente abrir ni reparar el dispositivo usted mismo. Encargue cualquier reparación a personal cualificado.
3. Contenido del paquete
Por favor, compruebe que todos los artículos estén presentes en el paquete:
- 1 x ELRO ARD51 Electronic Guard Dog Unit
- 1 x Power Adapter (1.5m cable)
- 1 x Etiqueta de seguridad
- 1 x Manual de instrucciones
Note: 8 x 1.5V AA batteries are not included and must be purchased separately if battery operation is desired.
4. Configuración
4.1 Encendido del dispositivo
The ELRO ARD51 can be powered by either the included AC adapter or 8 AA batteries.
- Uso del 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.
- Usando baterías: 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.

Imagen 2: Trasera view of the ELRO ARD51, illustrating the battery compartment and power adapter connection.
4.2 Colocación
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.

Imagen 3: Example 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. Operación del dispositivo
5.1 Encendido y apagado
Presione el Encendido/apagado 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.
Utilice el Seleccionar button on the top panel to cycle through these sound modes.
5.3 Ajuste del volumen
The volume can be adjusted from 70 dB to a maximum of 120 dB. Use the Volumen+ y Vol- 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:
- Alto: Maximum detection range.
- Medio: Medium detection range.
- Bajo: 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. Mantenimiento
- Limpieza: Limpie el dispositivo con un paño suave y seco. No utilice limpiadores abrasivos ni disolventes.
- Reemplazo de batería: 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.
- Almacenamiento: Si va a guardar el dispositivo durante un periodo prolongado, retire las pilas para evitar fugas. Guárdelo en un lugar fresco y seco.
7. Solución de problemas
| Problema | Posible causa | Solución |
|---|---|---|
| El dispositivo no se enciende. | 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. |
| No hay sonido o el sonido es débil. | Volumen configurado demasiado bajo. | Increase the volume using the Vol+ button. |
| El sensor no detecta movimiento. | 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. |
| Falsas alarmas. | 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. Especificaciones
- Modelo: ARD51
- Marca: ELRO
- Volumentage: 2.4 Volts (battery operation)
- Método de control: Botón pulsador
- Nivel máximo de sonido: 120 decibelios
- Tipo de montaje: Montaje en pared
- Rango máximo de detección: 16 metros
- Tecnología de sensores: Sensor de radar
- Fabricante: ELRO Europa
- Dimensiones del producto (L x An x Al): 15.2 x 10.2 x 15 cm
- Peso: 1.04 kilogramos
- Fuente de energía: AC/DC (Adapter included), 8 x 1.5V AA Alkaline Batteries (not included)
9. Información de garantía
For detailed warranty terms and conditions, please refer to the official ELRO webSitio web o la documentación de garantía incluida con su compra. Conserve el comprobante de compra para cualquier reclamación de garantía.
10. Atención al cliente
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 websitio o en el embalaje del producto.





