Specification: Origin: Mainland China Type: Module Condition: New Product Description: Fan Speed Regulation Principle: The USB fan with unadjustable air is a 5-volt electric direct supply fan motor, and the two-gear fan has a booster circuit board inside. When placed in second gear, the booster board will increase the 5 volts of USB and then connect to the motor, and the air volume will be large! The output voltage range of the stepless governor varies smoothly between 2.5 and 8.0 volts, and the air volume is set at will! And the range is wider! Turn the knob clockwise to increase the air volume, counterclockwise to reduce the air volume, and the knob with switch function! Function Description: Suitable for the very common 5.0V USB fan on the market How to Use: The male head of the governor can be inserted into the mobile phone chargers, charging bank, computer USB, etc. The fan plug can be inserted into the female head of the governor! Or use Micro USB 5.0V power supply. Power supply range: DC 4~12V Output range: DC 2.5-8.0V Rated power: 5W! (Do not overload) Note: When it is used to adjust the fan in two gears, please put the fan in first gear, otherwise it may not be possible to adjust the speed! Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1*Mini USB Fan Governor 1.Customizable Airflow: Tailor your USB fan's breeze to your preference with this mini USB fan governor, smoothly adjusting voltage output from 2.5V to 8.0V, providing a wider range for creating the perfect wind intensity. 2.Simple Operation: Effortlessly control fan speed with a user-friendly knob of this wind speed controller; turn clockwise to increase airflow or counterclockwise to decrease, also equipped with a switch function for easy on/off operation. 3.Versatile Compatibility: Designed to fit the ubiquitous 5.0V USB fans found in the market, this air volume cooling regulator can be connected to various power sources, including phone chargers, power banks, and computer USB ports. 4.Safe Power Handling: With a rated power of 5W, this fan speed switch module ensures safe usage without overloading, making it a reliable accessory for managing your fan's performance and longevity. 5.Portable Design: The compact, sleek build of this USB fan stepless governor makes it an ideal travel companion, allowing you to enhance your personal cooling experience with various USB fans, from desk fans to handheld models.