A salon appliance is a device used in beauty salons to help style and groom hair. The most common salon appliances are the dryer, styler, and hairdryer. A dryer is a device that uses hot air to dry wet hair, usually with a nozzle attachment. A styler is a device that uses heat to shape and style hair, such as curling irons and flat irons. A hairdryer is a device that uses a combination of hot air and a nozzle attachment to dry and style hair.