Powered through a USB interfaces, it supports various power devices such as laptops, portability power supply, making it to use any times Equipped with a digital display screen, it displays the current wind speeds levels in real time, helping users adjust wind speeds according to environmental needs The suspended and adjustable angles fan designs allows you to easily secure it in your tent, car, or anyplace you need it Provide strong and quiet wind output Even when used in quiet places such as offices or libraries, it will not disturb others This USB desktop fan is not only a small fan, but also equipped with a soft rainbow atmospheres light function to create a comfortable environment