This is an electric insect killer, also known as a bug zapper. It is a device that attracts and kills flying insects. The device typically uses a light source, often a fluorescent or LED lamp that emits ultraviolet (UV) light, to attract insects. The light source is surrounded by a high-voltage electrical grid. When an insect flies toward the light, it comes into contact with the grid and is electrocuted. Bug zappers are designed to attract and kill a variety of insects, including mosquitoes, flies, and moths.