USB fans are small, portable cooling devices that connect to a computer or power bank via a USB port. They are designed to provide a gentle breeze, making them ideal for personal use in hot environments, such as offices or during travel. Their compact size allows for easy transport and placement on desks or tables. These fans come in various designs and styles, often featuring adjustable speeds and angles for customized airflow. Many USB fans are powered directly from the USB source, eliminating the need for batteries or additional power adapters. This convenience makes them a popular choice for staying cool on the go.