A hair dryer is an electrical device used to dry and style hair. It works by blowing warm or hot air over wet hair, which helps to evaporate moisture quickly. Most hair dryers have adjustable heat and speed settings, allowing users to customize their drying experience. Typically, a hair dryer consists of a motor, a heating element, and a fan. The motor powers the fan, which draws in air and pushes it over the heating element before it exits through a nozzle. This design makes hair drying faster and more efficient compared to air drying alone.