(12) 20 oz. Cans. Wasp & hornet killer, dielectric 47 , 300 volts, tetramethrin, permethrin, piperonyl butoxide. DYNAMO is an EPA registered, residual insecticide effective against hornets, wasps, yellow jackets and bees on contact. Continues killing as insects return to the nest. Dielectric strength of 47,300 volts and a power jet spray reach up to 20 feet, providing a safer method of application than conventional means. Acts as a barrier preventing insects from entering the home. Contains Permethrin and Tetramethrin synergized with Piperonyl Butoxide.