Drops wasps, hornets and yellow jackets instantly. Kills with residual action as wasps and hornets return to nest. Jet spray-will reach nests up to 20 feet above ground . Contains synergist piperonyl butoxide, permethrin and tetramethrin dielectric breakdown voltage of 47,300 volts. Can be used both indoors (attics and other places where nests are built) and outdoors on wasp and hornet nests.