A USB fan is a small, portable fan that connects to devices via a USB port. It is commonly used to provide a cooling breeze in personal spaces, such as offices or bedrooms. These fans are powered by the electricity supplied through the USB connection, making them convenient for use with laptops, desktop computers, or power banks. USB fans come in various sizes and designs, ranging from simple clip-on models to more elaborate tabletop versions. They are energy-efficient and often lightweight, making them easy to transport. Many people use USB fans during hot weather or while working to enhance comfort without relying on larger, more energy-consuming fans or air conditioning units.