Electric hand dryers are devices used in public restrooms to dry hands quickly after washing. They work by blowing warm air onto wet hands, evaporating the moisture. These dryers are often more hygienic than paper towels, as they reduce the spread of germs and waste. Most electric hand dryers are equipped with sensors that activate the airflow when hands are placed underneath. They come in various designs and power levels, with some models drying hands in as little as 10-15 seconds. Popular brands include Dyson and Xlerator, known for their efficiency and modern designs.