Function introduction:<br>1. Micro USB is used as 5V 1A input port<br>2. Large USB makes 5V 1A output port<br>3. The indicator light is green when charging, blue when fully charged, and red when the power is insufficient<br>4. The status of starting the fan is as follows: (the output voltage of the fan decreases with the decrease of the battery voltage) ① press the key briefly, the fan will start to the first gear, the first gear light will be on, and the other two lights will not be on<br>② Press the second key briefly, the fan starts the second gear, the first and second gear lights up, and the third gear lights up<br>③ Short press the third button, the fan starts the third gear, and the gear lights up the first, second and third gear<br>④ Press the fourth button briefly, the fan stops working, and the gear light does not light up<br>
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