1. Introduction
This manual provides essential information for the safe and effective use of your onerbl AC/DC Adapter. This adapter is designed as a replacement power supply for the Grundig Yacht Boy YB305 Synthesized Receiver Radio. Please read this manual thoroughly before using the product.

Image 1.1: Front and side view of the onerbl AC/DC Adapter.
2. Safety Information
To ensure safe operation and prevent damage, observe the following precautions:
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Do not disassemble or attempt to repair the adapter. Refer all servicing to qualified personnel.
- Ensure the adapter is used with devices that match its voltage and current specifications. This adapter is specifically designed for the Grundig Yacht Boy YB305 radio.
- Avoid placing the adapter in areas with poor ventilation, as this can lead to overheating.
- Unplug the adapter from the wall outlet when not in use for extended periods.
- Keep out of reach of children.

Image 2.1: The adapter features multiple protection mechanisms including short-circuit, over-voltage, and over-current protection for enhanced safety.
3. Setup
- Verify Compatibility: Ensure your device is the Grundig Yacht Boy YB305 radio or another device compatible with the adapter's specifications (refer to Section 7: Specifications).
- Connect to Device: Insert the barrel connector of the adapter cable firmly into the power input port of your Grundig Yacht Boy YB305 radio.
- Plug into Power Outlet: Insert the AC plug of the adapter into a standard wall power outlet (AC 100-240V, 50/60Hz).
- Power On Device: Once connected, you can power on your radio.

Image 3.1: The adapter connected to a power source, demonstrating its compact design.
4. Operation
The onerbl AC/DC Adapter provides a stable power supply to your Grundig Yacht Boy YB305 radio. It is designed for continuous operation within its specified voltage and current limits.
- The adapter automatically adjusts to input voltages between 100V and 240V, making it suitable for worldwide use.
- The extended cord length (76 inches / 6.3 feet) provides flexibility in placement.

Image 4.1: Illustration of the adapter's extended cable length, offering convenient reach.
5. Maintenance
The onerbl AC/DC Adapter requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Cleaning: Disconnect the adapter from the power outlet and the device before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place when not in use. Avoid tightly coiling the cable to prevent damage.
- Inspection: Periodically inspect the cable and connector for any signs of wear, cuts, or damage. If damage is observed, discontinue use and replace the adapter.

Image 5.1: Internal construction details highlighting the durable copper wire and PVC jacket for long-lasting performance.
6. Troubleshooting
If you encounter issues with your adapter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. | Adapter not properly connected, power outlet issue, or device fault. |
|
| Adapter feels warm during use. | Normal operation, or poor ventilation. |
|
| Intermittent power to device. | Loose connection or damaged cable/connector. |
|
7. Specifications
| Feature | Detail |
|---|---|
| Brand | onerbl |
| Model Compatibility | Grundig Yacht Boy YB305 Synthesized Receiver Radio |
| Input Voltage | AC 100-240V, 50/60Hz (Worldwide Auto Input) |
| Connector Type | Barrel Connector |
| Cable Length | 76 inches (approximately 6.3 feet) |
| Protection Features | Over Voltage Protection, Over Heat Protection, Short-circuit Protection, Over-current Protection |
| Item Weight | 8 Ounces |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |

Image 7.1: Physical dimensions of the adapter and its cable length.
8. Warranty and Support
For warranty information or technical support, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
Manufacturer: Shenzhen Waweis Technology Co., Ltd