Natural Wind Mini Portable FanAbout this item Button function: first turn on the power switch on the back. Second, adjust the appropriate fan speed by repeatedly touching the front power button (low speed > medium speed > high speed). Finally, turn off the power switch on the back after use. The fan is very small and easy to carry. Perfect for use at home, office, desk or on the go. 3 speed ultra quiet design: low medium high speed level. The three speed design allows you to have