A rocker switch is a type of electrical switch that operates by rocking back and forth to open or close a circuit. It typically has a rectangular shape and is designed to be mounted on a panel or wall. When pressed on one side, it toggles to the opposite position, making it easy to control devices like lights or appliances. Rocker switches come in various styles and sizes, often featuring a visual indicator, such as a light, to show whether the circuit is on or off. They are commonly used in homes, vehicles, and industrial equipment due to their durability and user-friendly design.