1. Product Overview
The TOPK USB Portable Mini Desk Fan is designed to provide a refreshing breeze with strong airflow and quiet operation. Its compact and lightweight design makes it ideal for various settings, including office desktops, homes, and outdoor use. The fan features a 360° rotatable head for versatile airflow direction and three-speed wind control for customized comfort.

Figure 1: TOPK USB Portable Mini Desk Fan
Video 1: Product demonstration showing fan features and portability.
2. Specifications
| Attribute | Value |
|---|---|
| Product Name | USB Desk Fan |
| Model Number | K50, K51, K52 |
| Brand Name | TOPK |
| Power Source | USB Cable (DC5V/1.0A Input) |
| Output Power | 5W |
| Material | ABS + Electronic component |
| Fan Speed | Third Gear (3 speeds: Low, Medium, High) |
| Rotation Way | Rotate the Page (360° Rotatable) |
| Rotary Vane Quantity | 3 |
| Wind Type | Natural Wind, Sleep Wind, Prevailing Wind |
| Installation | Table |
| Product Weight | 150g |
| Product Size | 120 x 123 x 55mm |
| Certification | CE, EMC, RoHS |

Figure 2: Detailed product parameters and package contents.
3. Package Contents
- 1 x USB Desk Fan
- 1 x User Manual
4. Safety Warnings
To ensure product safety and prevent injury or property loss, please adhere to the following safety precautions. Failure to comply may result in accidents.
- This product is not a children's toy. Children under 14 years old should use it under the supervision of their guardians.
- Do not put your hands or foreign objects into the fan outlet to avoid injury or damage to the machine.
- Do not use this product in humid environments such as bathrooms, sinks, or swimming pools.
- Do not use wet objects to plug or unplug the power supply to avoid electric shock, short circuits, and other accidents.
- This product is not waterproof. Please do not immerse the product. If it accidentally gets wet, wipe it dry immediately. Complete immersion in water is prohibited to avoid danger.
- Do not use a power adapter higher than 5V.
5. Setup
- Place the USB Desk Fan on a stable, flat surface. The fan base includes 2 rubber pads to reduce vibration and prevent sliding.
- Connect the original USB cable to the fan's USB port.
- Plug the other end of the USB cable into a compatible power source, such as a PC/laptop, power bank, AC adapter (5V/1.0A recommended), or car charger.

Figure 3: Connecting the USB Desk Fan for power.
6. Operating Instructions
The fan features a simple one-button control for power and speed adjustment.
- To Turn On (Low-Speed): Press the power button once. The fan will start at low speed.
- To Adjust Speed (Medium-Speed): Press the power button a second time to switch to medium speed.
- To Adjust Speed (High-Speed): Press the power button a third time to switch to high speed.
- To Turn Off: Press the power button a fourth time to turn off the fan.

Figure 4: The fan offers 360° rotation for optimal airflow.

Figure 5: Three-speed wind adjustment: Speed 1 (2.6m/s), Speed 2 (3.6m/s), Speed 3 (4.6m/s).
7. Maintenance
- Cleaning: Ensure the power supply is cut off before cleaning the product.
- Surface Cleaning: If the fan mask cannot be removed, do not attempt to remove it by force. Instead, wipe the surface with a clean, dry cloth.
- Electrical Parts: Do not use water or other liquids to clean electrical parts.
- Internal Components: If the product has been disassembled (not recommended for users), it is strictly forbidden to touch the internal devices with wet hands or other wet objects.
8. Troubleshooting
- Fan not turning on: Ensure the USB cable is securely connected to both the fan and a compatible 5V power source. Try a different USB port or power adapter.
- Weak airflow: Check if the fan speed is set to a higher level. Ensure there are no obstructions blocking the fan blades or air intake/outlet.
- Unusual noise: Ensure the fan is placed on a stable surface. Check for any foreign objects that might be caught in the fan blades. If the noise persists, discontinue use and contact support.
9. User Tips
- For optimal cooling, position the fan to allow for good air circulation in the room, even if not directly facing you.
- Utilize the 360° rotation feature to direct airflow precisely where needed, whether for personal cooling or to circulate air in a small space.
- The quiet operation makes this fan suitable for use in bedrooms or study areas without causing disturbance.
- Its USB power compatibility makes it highly portable; consider using it with a power bank for outdoor activities or travel.
10. Warranty & Support
This TOPK USB Desk Fan is covered by standard product warranties. For any product quality or infringement issues, please contact the manufacturer or seller directly. Please refer to your purchase documentation for specific warranty terms and conditions.
EU Representative:
- eVatmaster Consulting GmbH
- Address: Bettinastr.30 60325 Frankfurt am Main, Germany
- Email: contact@evatmaster.com
- Tel: +496995179070
UK Representative:
- GOAL REACH CONSULTING LTD
- Address: OFFICE 1029 3 HARDMAN STREET 10TH FLOOR, SPINNINGFIELDS MANCHESTER, UK M3 3HF
- Email: goalservice@hotmail.com
- Tel: +442921680945
Note: These representatives act for cross-border sellers and are not involved in the manufacture, import, or sale of the product. They are not responsible for after-sales services related to the product.





