Hand dryers are electrical devices used to dry hands after washing. They work by blowing warm air onto wet hands, helping to evaporate moisture quickly. Hand dryers are commonly found in public restrooms, schools, and restaurants, providing a convenient alternative to paper towels. There are two main types of hand dryers: traditional hand dryers, which use a heating element to warm the air, and high-speed hand dryers, which use powerful jets of air to dry hands faster. Hand dryers are considered more environmentally friendly than paper towels, as they reduce waste and the need for constant restocking.