Raid Window Fly Traps will attract trap and hold flies gnats wasps moths and many other flying insects. Ideal product for any room where you want to control flying insects. Raid Window Fly Traps are odorless and transparent almost invisible. They do not mark windows and are easy to use. Flying insects are attracted to windows by light and heat. Insects are soon attracted trapped and held by the Raid Window Fly Trap. Use on any indoor window in any room to control flying insects.