The TIZ-3 has enough power to have the spark jump across the tiniest of insects unlike the Other models of Zappers. Ours kills Fruit Flies, Flees, Lice, Bed Bugs, Gnats, Mosquitoes, Small Ants and Fire Ants or Black Ants, Small up to large Roaches, House Flies, May Flies, Deer Flies, Horse Flies, Yellow Jacket Bees, Carpenter Bees, Hornets. Spiders, Centipedes, and Moths. This unit has 2400 volts of power with protective screens on both sides of the center Electrode Screen. This is not like the "Old Style" Zappers or our Mini-Zapper that gives you a shock when you touch the surface of the protective screen.