Say goodbye to pesky insects with the SET-04S Insect Trap. Insects are first attracted to the UV light, then a vacuum suction pulls the insects down to the collecting tray with glue pad where they perish naturally. This indoor electric insect trap also features a light sensor that automatically activates the insect trap in the dark. Quiet and safe to use – pesticide and odor free. Kills mosquitoes, fruit flies, gnats, no-see-ums and more. Simply place the insect trap in areas where these insects congregate and let it work its magic!