SpectracidePRO wasp and hornet killer is designed for a fast knockdown to kill wasps, hornets, and yellow jackets and eliminate the nests where they live and breed. This product also kills mud daubers. The jet spray reaches nests up to 20 feet away. This aerosol spray kills the entire nest and kills returning wasps and hornets for up to 4 weeks. This product has a dielectric breakdown voltage of 47,300 volts. Use this product outdoors only — never use it indoors. Spray the nest until soaked, standing a safe distance from the nest. Wait at least 24 hours before removing the nest (see product label for complete directions for application). To kill wasps, hornets, and yellow jackets, spray 1 to 2 seconds until the surface is moist, under eaves and around screens, windows, doors, patios, cracks, holes, and crevices, or wherever else insects are noticed.