Stryker Wasp and Hornet Killer kills on contact from up to 20 feet away. It knocks down hornets and wasps so quickly that they do not have time to release their stinging pheromones, which in turn reduces the possibility of the applicator being stung. Stryker Wasp and Hornet spray is for use outdoors, in crawlspaces, and in attics. It is electrically non-conductive at up to 37,160 volts which makes it perfectly safe to be used around electrical equipment. The long lasting residual activity of the spray will provide a complete elimination of the nest.