Electrical outlets are devices installed in walls that provide access to electrical power. They allow users to plug in various appliances and devices, such as lamps, chargers, and computers, to draw electricity from the power grid. Outlets typically have two or three holes, which correspond to the prongs of a plug. There are different types of electrical outlets, depending on the country and the specific electrical standards. For example, in the United States, the most common outlet type is the Type A and Type B outlets. These outlets are designed to safely deliver electricity while preventing accidental shocks.