1. Introduction
Thank you for choosing the Ejoyous Wired Alarm Siren Horn. This device is designed to enhance the security of your home or property by providing a loud, dual-tone alarm in response to security breaches. With its 150 dB output, it serves as an effective deterrent and alert system for both indoor and outdoor environments. This manual provides essential information for the proper installation, operation, and maintenance of your siren horn.
2. Product Overview
2.1 Key Features
- High Decibel Output: Produces a powerful 150 dB dual-tone sound, ensuring wide area coverage and effective deterrence.
- Wide Compatibility: Designed to integrate with various alarm connection systems, including alarm hosts, gas leakage alarms, and infrared peripheral alarm equipment.
- Durable Construction: Features an ABS fire-retardant shell, ensuring strength, durability, and a long service life.
- Easy Installation: Flexible and convenient installation options, suitable for wall, doorway, or balcony mounting.
- Compact Design: Small and lightweight for discreet placement.
2.2 Components
The Ejoyous Wired Alarm Siren Horn consists of the main siren unit with an integrated mounting bracket and wiring for connection to your alarm system.

Figure 1: Ejoyous Wired Alarm Siren Horn. This image shows the main siren unit, a white horn-shaped device with a mounting bracket and red/yellow wiring visible at the base.
3. Specifications
| Feature | Specification |
|---|---|
| Noise Level | 150 dB |
| Operating Voltage | DC 12V |
| Mounting Type | Wall Mount, Door Mount |
| Material | ABS Fire-retardant Shell |
| Product Dimensions | 7.87 x 4.92 x 9.06 inches (approx. 20 x 12.5 x 23 cm) |
| Item Weight | 1.92 pounds (approx. 0.87 kg) |
| Control Method | Wired (controlled by connected alarm system) |
| Model Number | Ejoyous0b4mzck3nu135 |
4. Setup and Installation
Proper installation is crucial for the effective operation of your siren horn. Ensure all power is disconnected from your alarm system before beginning installation.
4.1 Choosing an Installation Location
Select a location that maximizes sound propagation and deters potential intruders. Common locations include:
- On a wall, preferably near an entry point.
- Above a doorway.
- On a balcony or other elevated outdoor area.
It is recommended to install the siren at a height of 2.5 meters (approximately 8 feet) or more to prevent tampering and ensure sound travels effectively.

Figure 2: Example of outdoor installation. The image shows the white siren horn mounted on an exterior wall, demonstrating a suitable installation height and location.
4.2 Mounting the Siren
- Mark Drill Holes: Use the siren's mounting bracket as a template to mark the positions for drilling on your chosen surface.
- Drill Holes: Drill pilot holes at the marked positions.
- Secure Bracket: Attach the mounting bracket to the surface using appropriate screws (not included). Ensure it is firmly secured.
- Attach Siren: Mount the siren horn onto the secured bracket.
4.3 Wiring Connections
The siren horn operates on DC 12V. Connect the siren to your existing alarm system's siren output terminals. Refer to your alarm system's manual for specific wiring instructions.
- Red Wire: Connect to the positive (+) terminal of your alarm system's siren output.
- Yellow Wire: Connect to the negative (-) terminal of your alarm system's siren output.
Ensure all connections are secure and insulated to prevent short circuits.
5. Operating Instructions
The Ejoyous Wired Alarm Siren Horn functions as an output device for your security system. It does not operate independently but is triggered by your main alarm control panel.
5.1 Activating the Siren
When your alarm system detects an intrusion or other specified event (e.g., gas leakage, infrared detection), it will send a signal to the siren horn. The siren will then emit its 150 dB dual-tone alarm.

Figure 3: Siren activation illustration. The image depicts the siren horn with graphic elements suggesting sound waves, symbolizing its loud output when triggered by an alarm system.
5.2 Deactivating the Siren
The siren will cease sounding once the alarm system is disarmed or the triggering event is resolved, according to the programming of your main alarm control panel.
6. Maintenance
The Ejoyous Wired Alarm Siren Horn is designed for long-term, reliable operation with minimal maintenance.
- Regular Cleaning: Periodically wipe the exterior of the siren with a soft, damp cloth to remove dust and debris. Do not use harsh chemicals or abrasive cleaners.
- Inspect Wiring: Occasionally check the wiring connections for any signs of wear, corrosion, or damage. Ensure connections remain secure.
- Test Functionality: Regularly test your entire alarm system, including the siren, to ensure it is functioning correctly. Refer to your alarm system's manual for testing procedures.
No user-serviceable parts are inside the siren unit. Do not attempt to open or repair the device yourself, as this may void the warranty and could lead to electric shock.
7. Troubleshooting
If you experience issues with your Ejoyous Wired Alarm Siren Horn, consult the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Siren does not sound when alarm is triggered. |
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| Siren sounds continuously or unexpectedly. |
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| Sound is weak or distorted. |
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8. Warranty and Support
Ejoyous is committed to providing quality products and service. While specific warranty details are not provided in this manual, we assure you of our dedication to customer satisfaction.
If you encounter any problems with your Ejoyous Wired Alarm Siren Horn, or require technical assistance, please do not hesitate to contact our customer support team. Provide your product model number (Ejoyous0b4mzck3nu135) and a detailed description of the issue to facilitate a quicker resolution.
For support, please visit the Ejoyous store on Amazon or refer to the contact information provided with your purchase.