Optimal Cooling Control: Effortlessly manage the wind speed of your USB fan with our Mini USB Fan Speed Controller. This compact module is perfect for achieving the desired air volume, ensuring a comfortable environment whether or in the office. Quiet Operation: Designed with silence in mind, the cooling mute function allows you to enjoy a peaceful setting without the disturbance of noisy fan operation. Versatile Compatibility: Suitable for USB fans, this governor supports a DC 5V input, making it a universal solution for your cooling needs. Easy Installation: With its user-friendly design, this fan speed switch module can be easily integrated into your existing setup, providing immediate enhancement of your fan's functionality. Color: As Shown Material: plastic Package Contents: 10 * Fan Speed Switch Modules Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.