Champion Sprayon Wasp, Bee and Hornet Killer sprays up to 20 feet letting you kill wasps, bees, hornets and yellow jackets on contact. For best results, soak the nests with the spray in the evening, after all the insects have returned. This product has a dielectric breakdown voltage of 37.8 kv (as measured by ASTM test method D-877-87); it will resist electrical current up to 37,800 volts. Active ingredient: Synthetic pyrethroid, Tetramethrin