1. Introduction
Thank you for choosing the Comboss Solar Motion Sensor Alarm. This device is designed to provide effective deterrence against unwanted animals and intruders using a combination of ultrasonic sound, loud siren, and flashing lights. It is suitable for a variety of applications, including farms, gardens, orchards, barns, and yards. Please read this manual carefully before operation to ensure proper use and maximize the product's lifespan.
Important Safety Information:
- Keep the device away from children.
- Do not attempt to disassemble or modify the device.
- Ensure the solar panel is exposed to direct sunlight for optimal charging.
- Avoid placing the device in areas with excessive dust or moisture.
2. Product Overview
The Comboss Solar Motion Sensor Alarm is an advanced security and deterrence solution. It features a robust design for outdoor use, incorporating both solar and USB charging capabilities for continuous operation.

Figure 2.1: The Comboss Solar Motion Sensor Alarm, showing the main unit, remote controller, and USB charging cable.
Key Features:
- Dual Power Supply: Solar charging for outdoor use and USB charging for backup or initial charge.
- Motion Detection: PIR motion sensor with a sensing angle of 125 degrees and a range of 5-8 meters.
- Multiple Deterrence Modes: Combines ultrasonic sound, 129dB siren, and flashing lights.
- Four Work Modes: Customizable settings for 24-hour or night-only operation with different combinations of ultrasonic, siren, and flashing lights.
- Remote Control: Convenient remote for mode selection and arming/disarming.
- Durable Design: Suitable for various outdoor environments.
3. Setup and Installation
Proper installation ensures optimal performance of your solar motion sensor alarm.
3.1 Initial Charging
Before first use, it is recommended to charge the device for 4-6 hours using the solar panel in direct sunlight or via the provided USB cable. This ensures the internal battery is fully charged for immediate operation.

Figure 3.1: The device supports both solar charging when installed outdoors and DC charging via USB for initial setup or on cloudy days.
3.2 Mounting the Device
The alarm can be easily hung on posts, fences, trees, or walls. Choose a location that meets the following criteria:
- Direct Sunlight: Ensure the solar panel receives ample direct sunlight throughout the day for continuous charging.
- Optimal Height: Install the device at an adjustable height of 1 to 8 feet (approximately 0.3 to 2.4 meters) for best motion detection results.
- Clear Line of Sight: Position the sensor to have a clear view of the area you wish to protect, free from obstructions.

Figure 3.2: Examples of the alarm installed in different outdoor environments, demonstrating its versatility in deterring various threats.
4. Operating Instructions
The Comboss Solar Motion Sensor Alarm offers four distinct working modes, selectable via the remote control.
4.1 Understanding the Work Modes
Use the remote control to cycle through the following modes:
- Mode A: 24-hour Ultrasonic + Flashing Light. The device will emit ultrasonic waves and flash lights continuously upon motion detection, day and night.
- Mode B: Night Ultrasonic + Flashing Light. The device will emit ultrasonic waves and flash lights upon motion detection only during nighttime hours.
- Mode C: 24-hour Siren with Flashing Light. The device will activate a loud 129dB siren and flash lights upon motion detection, day and night.
- Mode D: Night Siren with Flashing Light. The device will activate a loud 129dB siren and flash lights upon motion detection only during nighttime hours.

Figure 4.1: Visual representation of the four distinct operating modes, showing their activation conditions and outputs.
4.2 Motion Sensing Functionality
The integrated motion sensor detects movement within its sensing area. When a moving object is detected, the alarm will automatically trigger according to the selected mode.

Figure 4.2: The motion sensor's effective range and angle, crucial for optimal placement.

Figure 4.3: The alarm's combined ultrasonic and siren capabilities are designed to deter a wide range of animals.

Figure 4.4: The alarm effectively deters animals in open field settings.
5. Maintenance
To ensure the longevity and optimal performance of your Comboss Solar Motion Sensor Alarm, follow these simple maintenance guidelines:
- Cleaning: Periodically wipe the solar panel and sensor lens with a soft, damp cloth to remove dust, dirt, or debris. A clean solar panel ensures efficient charging.
- Battery Care: The device uses a Lithium Polymer battery. While designed for continuous operation, ensure it receives adequate sunlight for charging. If stored for extended periods, charge it fully before storage and periodically during storage to maintain battery health.
- Inspection: Regularly check the mounting for stability and ensure no physical damage has occurred to the unit.
6. Troubleshooting
If you encounter issues with your Comboss Solar Motion Sensor Alarm, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not activating (no sound/light) | Low battery charge | Ensure the solar panel is in direct sunlight for several hours or charge via USB. |
| Device not activating | Motion sensor obstructed or dirty | Clean the sensor lens and ensure no objects are blocking its view. |
| Device activating too frequently or not at all | Incorrect placement or sensitivity | Adjust the mounting height and angle. Ensure it's not pointing at moving foliage or heat sources. |
| Remote control not working | Remote battery low or out of range | Replace the remote battery (if applicable) or move closer to the device. |
7. Technical Specifications
| Specification | Detail |
|---|---|
| Model Number | COM-911BG |
| Control Method | Remote |
| Mounting Type | Wall Mount |
| Maximum Range (Motion Sensor) | 8 Meters |
| Sensing Angle | 125 Degrees |
| Siren Output | 129dB |
| Power Source | Solar Powered |
| Battery Type | Lithium Polymer (1 AAA battery included) |
| Product Dimensions | 2.5 x 3.9 x 2.7 inches |
| Item Weight | 7.8 ounces |
| Color | Green |
8. Warranty and Support
Comboss products are manufactured to high-quality standards. This product comes with a standard manufacturer's warranty against defects in materials and workmanship. Please refer to the product packaging or your purchase receipt for specific warranty terms and duration.
For technical support, troubleshooting assistance, or warranty claims, please contact Comboss customer service through the retailer where you purchased the product or visit the official Comboss store on Amazon: Comboss Store.
Please have your product model number (COM-911BG) and purchase information ready when contacting support.