This Bug Zapper utilizes a specially treated UV-A light, which is proven to be the most effective lure for light sensitive flying insects, such as flies, moths, mosquitoes, and other flying insects. These lured insects are then electrocuted by the Zapper’s high voltage inner grid. No chemicals, no smell, no sprays, and no mess. This Bug Zapper is pollution free and is harmless to humans and pets. It is ideal for using in homes, offices, factories, food outlets, hospitals, and more.