SpectracidePRO? Wasp and Hornet Killer is designed to kill wasps, hornets, and yellow jackets on contact. Fast knockdown provides an effective solution to eliminate stinging insects from a safe distance with a jet spray that reaches nests up to 20 ft. away. Gets rid of the entire nest and keeps on killing returning wasps and hornets for up to 4 weeks. Dielectric breakdown voltage of 47,300 volts.