The Terminator Zapper's single frequency is to simply move a constant supply of Free electrons through the skin by capacitance. We use 15 Hz because this frequency also produces a mild euphoric effect. Any frequency works well for capacitance. Only five millionths of an ampere go into the body from the zapper – far below a harmful level, but it’s apparently devastating to all species of living pathogens (parasites). Worms are parasites, but so are bacteria, viruses, and fungi. Along with the teas, you can't lose!