Portable fans are small, lightweight devices designed to provide a cooling breeze in various settings. They can be powered by batteries, USB connections, or electrical outlets, making them convenient for both indoor and outdoor use. Commonly used during hot weather, these fans help improve air circulation and comfort in spaces like homes, offices, and campsites. Many portable fans come with adjustable speeds and oscillation features, allowing users to customize airflow according to their needs. Some models are designed to be quiet, making them suitable for use while sleeping or working. Popular brands include Dyson, Vornado, and O2COOL.