- Easy Volume Control: Simply turn the knob clockwise to increase the volume and counterclockwise to decrease it. The knob also functions as a switch for added convenience. - Reliable Motor Governor: This product operates within a supply range of 4 to 12 V with a maximum rated value of 5 W (avoid overload). It supports up to 5A current, ensuring stable performance for your devices. - Durable Design: Made from a combination of PC and metal materials, this potentiometer is built to last, providing long-term use without compromising quality. - Simple Setup: Connect the controller to your phone or power bank, then plug your fan’s USB into the controller's USB port. Adjust the knob to easily manage the fan's volume to your preference. - Versatile Applications: Ideal for various scenarios, such as adjusting the speed of computer fans, enhancing home office comfort, or controlling cooling systems in electronics. The stepless speed regulation allows for precise adjustments between 2.5V and 8V, ensuring optimal airflow and comfort. - Box Contents: The package includes one fan controller module designed for straightforward operation and compatibility with a wide range of devices. This fan controller provides a practical solution for managing device cooling while ensuring ease of use and durability.