- Operating Voltage: 4 to 12 V, with a rated power of 5 W (avoid overload). - Easy Setup: Simply plug the regulator into your phone charger, connect the fan's USB plug to the regulator, and adjust the dial for desired performance. - Precise Speed Control: Enjoy stepless speed regulation with stable output voltages ranging from 2.5 V to 8 V, allowing you to customize the fan speed for maximum comfort. - High-Quality Material: Constructed from durable ABS, this device features a USB input and a user-friendly rotary control – turn clockwise to increase speed and counterclockwise to decrease it. Use Scenarios: 1. Perfect for personal cooling at your desk, providing a tailored airflow to keep you comfortable while working or studying. 2. Ideal for outdoor activities, such as camping or picnics, where portable cooling is needed. 3. Suitable for use in small spaces or during travel, ensuring you have control over your environment wherever you go. This regulator is designed to enhance your fan's performance while ensuring compatibility and ease of use. Enjoy reliable cooling wherever you are with this essential accessory.