In the main screen, click on "220V Cooling Fan" it will start running, click on the upper left corner you can set the timer to stop, you can click on the icon on the top right corner of the fan type, wind speed and sound settings, you can customize tune out most comfortable pitch . Small tried to play "220V Cooling Fan", just like many years ago in a small town, grandmother shaking Pushan, driving the fan, gently coax sleep Midsummer Night, close your eyes but clearly ah memories! If you're obsessed with this "220V Cooling Fan" honest feelings of sound, or there are signs of insomnia, try to let Sleepy Fan to sleep with you.