A blow dryer is a household appliance used to dry and style hair quickly. It is also called a hair dryer and consists of a handheld device with a motorized fan that blows air over heated coils. The device creates a flow of warm air that can be directed onto the hair. Blow dryers usually come with different settings for heat and airflow, as well as different attachments. These attachments, such as a concentrator nozzle, can be used to direct the flow of air onto specific sections of the hair. Blow dryers are commonly used in hair salons and at home for various hair styling purposes, such as straightening, curling, or adding volume.