A hair dryer is an electrical device used to dry and style hair by blowing warm or hot air. It typically consists of a motor, a heating element, and a fan. Users can adjust the heat and speed settings to suit their hair type and desired style. Hair dryers are commonly used after washing hair to speed up the drying process. Most hair dryers come with various attachments, such as diffusers and concentrators, to help achieve different styles. They are widely available in beauty supply stores and online, making them accessible for personal use. Proper care and maintenance can extend the life of a hair dryer.