Introduction
The Comboss Solar Motion Sensor Sound Alarm is an advanced outdoor security device designed to deter unwanted animals and intruders with its powerful sound siren and flashing strobe lights. Featuring a built-in microphone for custom sound recording and adjustable volume, this alarm offers versatile protection for homes, villas, farms, barns, orchards, and other properties. Its solar-powered design ensures continuous operation, even in remote locations without direct power access.

Figure 1: Comboss Solar Motion Sensor Sound Alarm with included remote control and charging cable.
Key Features
- Adjustable Volume & Recording Function: Equipped with a remote control and built-in microphone, allowing users to record custom alarm sounds and adjust siren volume.
- Multiple Work Modes:
- Mode B: 24-hour siren and flashing alarm.
- Mode C: Night siren and flashing alarm.
- Mode A: Cyclic flash & alarm sound every 5 minutes at night (Auto).
- Sensitive Motion Sensor: Detects movement within 5-8 meters, activating the sound and strobe light alarm.
- Solar & DC Powered: Features a powerful solar panel for automatic charging, even on low-sun days. Can also be charged via an adapter for areas with limited sunlight.
- High-Power Loudspeaker: Delivers a loud 130dB alarm to effectively deter animals and intruders.

Figure 2: Remote control for selecting operating modes and adjusting settings.
Setup
- Unboxing: Carefully remove the solar alarm, remote control, and charging cable from the packaging.
- Initial Charge: Although solar-powered, it is recommended to fully charge the device using the provided DC adapter before first use, especially if sunlight is limited. The device includes 1 Lithium Metal battery.
- Mounting: Choose a location with ample direct sunlight for optimal solar charging. The device can be mounted on a wall, fence post, or other suitable surface using the integrated mounting bracket. Ensure the motion sensor faces the area you wish to monitor.
- Power On: Press the power button on the device or the remote control to turn it on.

Figure 3: Demonstrating the recording function on the device.
Operating Instructions
Selecting Work Modes:
Use the remote control to select your desired operating mode:
- Mode A (Cyclic Flash & Alarm): Press the 'A' button. The alarm will cycle through flashing and sounding every 5 minutes at night.
- Mode B (24-Hour Alarm): Press the 'B' button. The alarm will activate with sound and flash whenever motion is detected, day or night.
- Mode C (Night Alarm): Press the 'C' button. The alarm will activate with sound and flash only when motion is detected during nighttime hours.
Recording Custom Sounds:
The alarm allows you to record your own custom sound (up to 20 seconds) to be used as the alarm tone. This is particularly useful for deterring specific animals by recording human voices or predator sounds.
- Ensure the device is powered on.
- Press the microphone/recording button on the remote control or directly on the device. The indicator light will illuminate, and you will hear a "di" sound, indicating it's ready to record.
- Speak clearly or play the desired sound towards the device's microphone.
- Recording takes up to 20 seconds and stops automatically. If your content is over 20 seconds, the new recording will cover the previous content.
- To play the recorded sound, press the play button on the remote control or device.
Adjusting Volume:
Use the '+' and '-' buttons on the remote control to increase or decrease the siren volume. There are three adjustable volume levels.

Figure 4: Visual representation of the three selectable working modes.
Video 1: Demonstration of the new adjustable volume solar sound and light alarm, showcasing its features and functionality.
Video 2: Overview of the high-power solar alarm light, highlighting its effectiveness in various outdoor settings.
Maintenance
- Solar Panel Cleaning: Periodically wipe the solar panel with a soft, damp cloth to remove dust, dirt, or debris that may hinder charging efficiency.
- Sensor Area: Keep the motion sensor lens clear of obstructions (e.g., leaves, spiderwebs) to ensure accurate detection.
- Battery Life: The integrated Lithium Metal battery is designed for long-term use. If the device's performance significantly degrades, ensure it receives adequate sunlight or charge it via the DC adapter.
- Storage: If storing the device for an extended period, ensure it is fully charged and stored in a cool, dry place.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not turning on or holding charge. | Insufficient sunlight; battery depleted; faulty unit. | Ensure solar panel receives 6-8 hours of direct sunlight daily. Charge via DC adapter. If issues persist, contact customer support. |
| Motion sensor not detecting. | Sensor obstructed; incorrect mode; range too far. | Clear obstructions from sensor lens. Verify correct operating mode (Mode B or C). Ensure target is within 5-8 meter range. |
| Alarm sound is too low or unclear. | Volume setting too low; poor recording quality. | Increase volume using the '+' button on the remote. Re-record custom sound in a quiet environment, speaking clearly and close to the microphone. |
| Alarm triggers too frequently (false alarms). | Branches/foliage moving in wind; small animals. | Relocate the device away from moving foliage. Consider using Mode C (Night Alarm) if false alarms occur during the day due to non-threatening movement. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | C911F-N |
| Power Source | Solar Powered, Battery Powered |
| Battery Type | 1 Lithium Metal battery (included) |
| Voltage | 3.7 Volts |
| Noise Level | 130 dB |
| Motion Sensor Range | 5-8 meters |
| Control Method | Remote |
| Sensor Technology | Photoelectric Sensor |
| Product Dimensions | 5.51 x 3.54 x 3.54 inches |
| Item Weight | 12.7 ounces |
| Color | Green + Red |
| Included Components | Detector, Solar Motion Sensor Alarm, Batteries, Remote Controller |
Warranty & Support
Comboss stands firmly behind the quality of its products. The Solar Motion Sensor Sound Alarm comes with a 1-year full warranty, ensuring that every component and part meets high-quality standards.
For further assistance, troubleshooting, or warranty claims, please refer to the official user manual PDF or contact Comboss customer support directly.
Official User Manual (PDF): Download Here