![](https://img.alicdn.com/imgextra/i3/1664378244/O1CN01FhUCjp2AlnhrfRggF_!!1664378244.jpg)
Principle of fan speed regulation:
The non-adjustable USB fan is a 5V direct-supply fan motor, and the two-speed fan has a booster circuit board inside. When placed in the second gear, the booster board will raise the 5V of the USB. Connect the motor, the air volume will be large!
The output voltage range of the stepless speed regulator smoothly changes from 2.5V to 8.0V, and the air volume can be set arbitrarily! And the scope is wider! Turn the knob clockwise to increase the air volume, turn it counterclockwise to decrease the air volume, and the knob has a switch function!
![](https://img.alicdn.com/imgextra/i1/1664378244/O1CN01Vag3Tl2AlnhpQFDHw_!!1664378244.jpg)
1. Function description:
Suitable for the very common 5.0V USB fans on the market
2. How to use:
Plug the male head of the governor into the mobile phone charger, power bank, computer USB, etc., and then insert the fan plug into the female head of the governor! Or use Micro USB 5.0V power supply.
3. Power supply range: DC 4~12V
4. Output range: DC 2.5~ 8.0V
5. Rated power: 5W!(Do not overload use)
6. Matters needing attention:
When it is used to adjust the fan in two gears, please set the fan to the first gear, otherwise it may not be possible to adjust the speed!
![](https://img.alicdn.com/imgextra/i2/1664378244/O1CN010ptLkU2AlnhvBOw5q_!!1664378244.jpg)
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