Kills House Flies, May Flies, Deer Flies, Horse Flies, Mosquitoes, Yellow Jackets, Hornets. Wasps, Spiders, Cockroaches, Centipedes,Moths and Cave Crickets. * This unit has 1500 volts of power with protective screens. * It is 21 1/2 inches long. 8.5"x10" head and weighs a 14 ounces with two D batteries * This Zapper Does Not Fold Up. * 2 D Battries Needed (Not Included)