A **bug zapper** is an electronic device designed to attract and eliminate flying insects, such as mosquitoes, flies, and moths. It utilizes a light source—typically **ultraviolet (UV)**—to lure pests toward an internal high-voltage metal grid. Upon physical contact with the grid, the insect completes an electrical circuit and is instantly dispatched by an electric discharge. Commonly used in outdoor patios and gardens, these devices provide a chemical-free method of pest control, though they are often housed in a protective plastic or grounded metal cage to prevent accidental contact by people or pets.