Introduction
This manual provides essential instructions for the safe and effective use of your onerbl AC-DC Adapter. This adapter is specifically designed to provide power to the Cayman Media Labs HD-21 Home Theater Soundbar System. Please read this manual thoroughly before use and retain it for future reference.
Safety Information
- Indoor Use Only: This adapter is designed for indoor use in dry locations. Do not expose to rain, moisture, or extreme humidity.
- Proper Ventilation: Ensure the adapter has adequate ventilation. Do not cover it or operate it in an enclosed space that could lead to overheating.
- Voltage Compatibility: Only connect the adapter to power outlets providing the specified input voltage (110-240V AC).
- Cable Integrity: Regularly inspect the power cord for any signs of damage. Do not use if the cord is frayed or damaged.
- Avoid Disassembly: Do not attempt to open or repair the adapter. This may cause electric shock and will void any warranty.
- Children and Pets: Keep the adapter and its cord out of reach of children and pets to prevent accidents.
Setup
Follow these steps to properly connect your onerbl AC-DC Adapter to your Cayman Media Labs HD-21 Soundbar System.
- Identify the Power Input: Locate the DC power input port on your Cayman Media Labs HD-21 Soundbar System. This port is typically labeled 'DC IN' or similar and is designed for a barrel connector.
- Connect the Adapter: Carefully insert the barrel connector of the onerbl AC-DC Adapter into the DC power input port of your soundbar. Ensure a snug and secure fit.
- Plug into Power Outlet: Insert the AC plug of the adapter into a standard wall power outlet (110-240V AC).
- Verify Connection: Once connected, your soundbar should receive power. Refer to your soundbar's manual for specific power indicator lights.

Image: The onerbl AC-DC Adapter connected to a power strip, ready to power a compatible device.
Operating Instructions
The onerbl AC-DC Adapter functions as a dedicated power supply for your compatible device. No user interaction is required for its operation beyond proper connection.
- Once properly connected to the soundbar and a power outlet, the adapter will continuously supply the necessary 15V DC power.
- The adapter features built-in Over Voltage Protection and Over Heat Protection to safeguard both the adapter and your connected device.
Maintenance
To ensure the longevity and optimal performance of your onerbl AC-DC Adapter, follow these simple maintenance guidelines:
- Cleaning: Disconnect the adapter from the power outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: When not in use for extended periods, store the adapter in a cool, dry place, away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or crimping the power cord excessively. Do not place heavy objects on the cord.
Troubleshooting
If you encounter issues with your onerbl AC-DC Adapter, refer to the following common problems and solutions:
- Device Not Powering On:
- Ensure the adapter is securely plugged into both the soundbar and a working wall outlet.
- Test the wall outlet with another device to confirm it is supplying power.
- Check the adapter's cable for any visible damage. If damaged, discontinue use.
- Adapter Overheating:
- Disconnect the adapter from the power source and the device. Allow it to cool down.
- Ensure the adapter is in a well-ventilated area and not covered.
- If overheating persists, discontinue use and contact support.
Specifications
Detailed technical specifications for the onerbl AC-DC Adapter.

Image: Front and side views of the onerbl AC-DC Adapter, displaying its design and label information.

Image: Visual representation of the onerbl AC-DC Adapter's dimensions and cable length for reference.
| Feature | Detail |
|---|---|
| Brand | onerbl |
| Model Compatibility | Cayman Media Labs HD-21 HD21 Home Theater Soundbar System |
| Input Voltage | 110-240V AC |
| Output Voltage | 15V DC |
| Output Current | 1.5A (1500mA) |
| Connector Type | Barrel Connector |
| Special Features | Over Voltage Protection, Over Heat Protection, Short Circuit Protection |
| Color | Black |
| Power Source | Corded Electric |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
Warranty and Support
For warranty information or technical support regarding your onerbl AC-DC Adapter, please refer to the documentation provided with your purchase or contact the retailer where the product was acquired. Ensure you have your product model number (compatible with Cayman Media Labs HD-21) and purchase details available when seeking support.