3-Speed AdjustableThe touch-sensitive button is located on the top of the USB desk fan, which can be used to adjust the fan speed. The powerful desktop fan has 3 modes, light wind, medium wind and strong wind. Press and hold for 2 seconds to turn off the power. Use low speed when sleeping and working, and high speed when exercising. USB & Battery OperatedWe provide a usb cable for the bedroom fan to make sure you can easily connect it to the power supply. For safe transportation and use, the quiet and powerful USB fan is not equipped with batteries, and an extension USB cable is included to connect to a computer, power bank or adapter Silent Cooling FanSilent USB desktop fan is not only powerful but also quiet, perfect for bedroom use and baby sleeping. Turn the mini table fan to low speed (1 gear), almost no noise (<20db), the soft wind helps to cool down, and you can fall asleep easily. The same situation also applies to study and office. Strong AirflowThe cooling desk fan is suitable for different scenarios. The high-speed fan can generate strong airflow in hot summer. Improved fan blade angle and size allow for easy cooling indoors or out. Safe ABS material and durable brushless motor make it perfect for office, desk, dorm, home, bedroom, library and camping.