Use this product both indoors (attics and other places where nests are built and where food or feed are not exposed) and outdoors on Hornet, Wasp and Yellow Jacket nests. • KILLS: Hornets, Wasps and Yellow Jackets on Contact • Gives Rapid Knockdown and Kill of Hornets, Wasps and Yellow Jackets • Gives rapid contact kill and residual kill of insects returning to the treated nest • Reaches nests more than 20 feet above ground • Dielectric Breakdown Voltage: 41.0 kV by ASTM Test Method D-877-87