Introduction
The KERUI SJ1 Wireless Outdoor Solar Siren Panel is an advanced security device designed to enhance your alarm system with powerful sound and visual alerts. Featuring solar power capabilities and robust construction, it provides reliable outdoor protection. This manual will guide you through the installation, operation, and maintenance of your SJ1 siren.

Key Features
- Fashionable and patented design.
- Supports wired and wireless linkage control for easy installation.
- Smart and adjustable volume with 4 levels, including a mute option.
- Features a 110dB super loud siren and blue flashing light for effective deterrence.
- EEPROM information protection ensures settings are never lost.
- Outdoor-rated with waterproof and anti-tamper functions.
- Wireless intelligent study coding (1527) supports up to 20 remote controls and 40 detectors.
- Built-in 3.7V/2200mAh backup lithium battery.
- AC/DC power options for uninterrupted 24-hour guarding.
- Solar power supply and solar power rechargeable for energy efficiency.

Setup and Installation
The KERUI SJ1 siren is designed for easy integration with compatible KERUI alarm systems (e.g., W181, W184, W202, W204). Ensure your alarm system supports 433MHz frequency and 1527/2262 coding for compatibility.
Mounting the Siren
- Choose an outdoor location that receives ample sunlight for optimal solar charging.
- Ensure the mounting surface is stable and secure.
- Use appropriate screws and anchors to securely mount the siren to the wall. The back panel of the siren has designated mounting points.

Learning Accessories (Pairing Sensors/Remotes)
To pair new accessories (remote controls, door/window sensors, PIR motion detectors) with your SJ1 siren:
- Open the back cover of the siren to access the internal buttons.
- Locate the "Volume / Set" button (often labeled as "Set" or similar).
- Press and hold this button for approximately 3 seconds. The siren will emit a single "di" sound, indicating it has entered configuration mode.
- Within 10 seconds, trigger the accessory you wish to pair (e.g., press a button on the remote, separate the door sensor, or activate the PIR motion detector).
- The siren will emit "di di" twice, confirming successful pairing.
- Repeat for all accessories.

For a visual guide on pairing accessories, please refer to the product demonstration video below:
Operation
Arming and Disarming
The SJ1 siren operates in conjunction with your KERUI alarm system. When your main alarm panel is armed, the siren will be active. When the alarm panel is disarmed, the siren will also be disarmed.
- Arm: When the alarm system is armed, the siren is ready to trigger upon detection.
- Disarm: When the alarm system is disarmed, the siren will not trigger.
- SOS: Pressing the SOS button on a paired remote control will immediately trigger the siren.

Volume Adjustment and Alarm Tones
The siren's volume is adjustable from 0 to 110dB, with 4 distinct levels. You can also select from 4 different alarm voices/tones.
- To adjust the volume or change the alarm tone, open the back cover of the siren.
- Locate the respective buttons for "Volume / Set" and "Alarm Music / Alarm Time".
- Press the "Volume / Set" button to cycle through volume levels.
- Press the "Alarm Music / Alarm Time" button to cycle through alarm tones.
Refer to the product video in the Setup section for a demonstration of volume adjustment and alarm tone selection.
Anti-Tamper Function
The SJ1 siren is equipped with an anti-tamper switch. If the siren is forcibly removed from its mounting location while armed, it will immediately trigger an alarm, providing an additional layer of security.
Maintenance
Power Supply and Battery
The siren is primarily powered by its integrated solar panel, which charges a built-in 3.7V/2200mAh backup lithium battery. This ensures continuous operation even during power outages or periods of low sunlight. For initial setup or prolonged periods without sufficient sunlight, the siren can be charged via its AC/DC input (5V 2A).
- Ensure the solar panel is clean and free from obstructions (dirt, leaves, snow) to maximize charging efficiency.
- If the siren is installed in a shaded area or experiences frequent low-light conditions, periodic manual charging via AC/DC adapter may be necessary.
Waterproof Design
The SJ1 siren features a waterproof design, making it suitable for outdoor installation. While designed to withstand various weather conditions, avoid submerging the device in water.

Cleaning
Wipe the siren's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Siren does not respond to alarm system. | Not properly paired; incompatible frequency/coding; low battery. | Re-pair the siren with the alarm system (see "Learning Accessories"). Ensure your alarm system is 433MHz and uses 1527/2262 coding. Check siren battery level and charge if necessary. |
| Siren triggers randomly or sounds by itself. | False triggers from sensors; environmental interference; internal fault. | Check all paired sensors for false triggers. Ensure siren is not exposed to extreme vibrations or direct impact. Perform a factory reset (see "Restoring Factory Settings"). If the issue persists, contact support. |
| Siren is not loud enough. | Volume setting is too low. | Adjust the volume level using the internal "Volume / Set" button (0-110dB). |
| Siren battery drains quickly. | Insufficient solar charging; faulty battery. | Ensure the solar panel is clean and receives direct sunlight for several hours daily. If the problem persists, the internal battery may need replacement. |
Restoring Factory Settings
If you encounter persistent issues or wish to clear all paired accessories, you can restore the siren to its factory settings:
- Open the back cover of the siren and enter the configuration mode by holding the "Volume / Set" button for 3 seconds (siren emits one "di" sound).
- While in configuration mode, press and hold the "Alarm Music / Alarm Time" button for 3 seconds. The siren will emit a "beep" sound 6 times, indicating that factory settings have been successfully restored.
Specifications
| Attribute | Value |
|---|---|
| Model Number | KR-SJ1 |
| Brand Name | KERUI |
| Type | Wireless Outdoor Solar Alarm Siren |
| Frequency | 433MHz |
| Color | White/Blue |
| Power Supply | 5V 2A (AC/DC) |
| Backup Battery | Built-in 3.7V/2200mAh Lithium |
| Wireless Receive Distance | 100m (open area) |
| Compatible Coding | 1527, 2262 |
| Defence Zones | 99 wireless + 2 wired |
| Alarm Output | DC5V 2000mA |
| Alarm Volume | 110dB |
| Humidity | ≤80% |
| Material | Plastic, Electronic Components |
| Dimensions (H x W x D) | 300mm x 200mm x 30mm (approximate) |
| Certifications | CE, ROHS, CCC |


User Tips
- Placement for Sound: For optimal sound coverage, consider the acoustics of your property. While powerful, in very large open spaces like bungalows, the sound might disperse more. It performs very effectively in typical residential settings like terraced houses or condos.
- Configuration Resources: If you need further assistance with configuration, especially with specific alarm panel models, search for instructional videos on platforms like YouTube. Many users share helpful guides for KERUI products.
- LED Behavior: The blue flashing lights on the siren primarily activate when the alarm is triggered or during arming/disarming signals. They are not continuously on during standby.
Warranty and Support
For warranty information, technical support, or replacement parts (such as the 3.7V 2200mAh battery), please contact your original retailer or the KERUI Official Store directly. Provide your product model (KR-SJ1) and purchase details for efficient service.





