Introduction
This manual provides instructions for the OUDAER Solar Outdoor Motion Sensor Alarm, Model SC-N991S. This device is designed to deter unwanted animals and intruders from outdoor areas such as yards, gardens, and farms using motion-activated sound and strobe light alerts. It features 13 distinct sound options, a recording function, and dual charging capabilities.
What's Included
The package contains the following components:
- One Solar-Powered Motion Alarm Unit
- One Infrared Remote Control
- One Ground Stake
- One Adjustable Mounting Bracket
- Two Screws
- Two Expansion Plugs
- One User Manual (this document)

Image: All components included in the OUDAER Solar Outdoor Motion Sensor Alarm kit.
Setup and Installation
The OUDAER Solar Outdoor Motion Sensor Alarm can be installed using either the ground stake or the adjustable mounting bracket.
Ground-Mounted Installation:
- Attach the alarm unit to the top of the ground stake.
- Insert the ground stake firmly into the soil in your desired outdoor location. Ensure the solar panel faces upwards to receive direct sunlight.
Wall-Mounted Installation:
- Attach the adjustable mounting bracket to the back of the alarm unit.
- Using the provided screws and expansion plugs, secure the mounting bracket to a wall or fence. Adjust the angle of the alarm unit as needed to optimize motion detection and solar charging.

Image: Product details illustrating components and remote control functions.
Video: Demonstrates the features and installation options of the Solar Motion Sensor Alarm.
Operating Modes
The alarm offers two selectable operating modes, controlled via the infrared remote:
- Mode 1 (Button A on Remote): 24-hour motion-activated sound and light alerts. In this mode, the device will detect motion and trigger an alarm with a strobe light at any time of day or night. You can choose to loop through all 13 sound options or set one fixed sound.
- Mode 2 (Button B on Remote): Night-only motion-activated sound and light alerts. This mode functions identically to Mode 1 but is active only during nighttime hours.
- Button D on Remote: Remote control standby. This button can be used to turn the device on or off remotely.

Image: Usage scenarios for the motion sensor alarm in different outdoor environments.
Sound Options and Recording
The alarm features 13 pre-set sound effects and a custom recording function.
Available Sounds:
Dog barking, gunshot, wolf howling, gong, eagle call, firecracker, lion roar, pig squeal, explosion, beep alarm, car horn, siren, bell, and whistle.
Custom Recording:
To record a custom message (up to 15 seconds), locate the microphone on the device (refer to the "Product Details" image in the Setup section). Long press the designated button to begin recording. Short press the button to switch between pre-set sounds.
Button C on Remote: Use this button to cycle through the available sound options.

Image: Overview of the 13 sound options and the recording capability.
Video: Demonstration of the Solar Motion Sensor Alarm's recording function.
Video: Demonstrates the range, remote control functions, and the 13 available sounds of the solar alarm.
Charging
The device supports dual charging methods:
- Solar Charging: The integrated solar panel charges the built-in 3.7V 1200mAh rechargeable lithium battery during daylight hours. Ensure the solar panel is exposed to direct sunlight for optimal charging.
- USB Charging: For faster charging or during periods of low sunlight, the device can be charged via a USB cable (DC plug-in charging). Connect the USB cable to the DC charge port on the unit.

Image: Illustration of the two charging modes: solar and USB.
Maintenance
To ensure optimal performance and longevity of your OUDAER Solar Outdoor Motion Sensor Alarm, follow these maintenance guidelines:
- Clean Solar Panel: Regularly wipe the solar panel with a soft, damp cloth to remove dust, dirt, or debris that may obstruct sunlight and reduce charging efficiency.
- Clear Sensors: Ensure the motion sensors are free from obstructions like leaves, branches, or spiderwebs to maintain accurate detection.
- Check for Damage: Periodically inspect the unit for any physical damage, especially after severe weather conditions.
- Battery Care: While the battery is rechargeable, prolonged periods of no sunlight may require occasional USB charging to maintain battery health.

Image: The alarm unit demonstrating its IP55 waterproof and dustproof capabilities.
Troubleshooting
If you encounter issues with your OUDAER Solar Outdoor Motion Sensor Alarm, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Device not activating (no sound/light) |
|
| Alarm sound is too low or inconsistent |
|
| Motion detection range is limited or inaccurate |
|
| Remote control not working |
|
Specifications
| Feature | Detail |
|---|---|
| Brand | OUDAER |
| Model Number | SC-N991S |
| Product Dimensions (L x W x H) | 3.9" x 3.9" x 2.9" |
| Noise Level | Up to 130 dB |
| Sensor Technology | PIR (Passive Infrared) Biosensor |
| Battery | 1 x 3.7V 1200mAh Lithium Ion (included) |
| Control Method | Push Button, Infrared Remote Control |
| Remote Control Range | 492-820 feet |
| Sound Options | 13 pre-set sounds + custom recording (max 15 seconds) |
| Charging | Solar + USB |
Warranty and Support
The OUDAER Solar Outdoor Motion Sensor Alarm (Model SC-N991S) comes with a 24-month warranty from the manufacturer, covering defects in materials and workmanship under normal use. Additionally, a 1-year manufacturer warranty is provided.
For technical assistance, warranty claims, or any product-related inquiries, please contact OUDAER customer service through the retailer's platform or the contact information provided with your purchase. Please have your model number (SC-N991S) and purchase date available when contacting support.