* Although it is not proven. The DESKTOP ELECTRO-MAGNETIC FIELD TUNER (DEFT) (USB-Powered) might be used to counter some of the ill-effects of Electronic Harassment! With this device you can precisely select any frequency from .01 Hz to 2 MHz, and adjust the power output as well. Produces a mammoth intensity signal: from 1 mG to over 100 mG! Digital display leaves no uncertainty about what frequency is selected. Includes memory for up to 10 favorite frequencies. USB powered from your computer or AC adapter (provided). Some people have said that it feels as though an invisible weight has been lifted off their shoulders. Irritability, eye strain, and general tiredness from using electrical appliances can feel lessened. Desktop Electro-Magnetic Field Tuner (USB-Powered) Tunable, Adjustable, Powerful   This unit can also be used as an Audible Tone Generator or Frequency Counter. Produces Sine, Sawtooth and Square wave patterns. Step by step instructions included. Puts the full power of the Schumann Resonance in your hands!  In 1952, the German scientist W.O.Schumann discovered a natural pulse resonating around our planet, beating at a frequency of 7.83 Hz (thereafter called the Schumann Resonance). Research has proved that electro-magnetic pollution can inhibit the human body's ability to synchronise with the Earth's natural magnetic pulse, thereby throtteling Melatonin, a major cancer suppressant and cell-rejuvenating neuro- hormone produced in the brain. Depending on your point of view, living beings either evolved in this natural electromagnetic environment (called The Schumann Resonances) or were created with Divine Intelligence to live in harmony with it. One thing is certain: Since life began, the Earth has been surrounding all living things with this natural frequency pulsation. Many experts believe that the wide spectrum of artificial man-made EMF radiation masks the natural beneficial frequency of the Earth. Electropollution may cause us to feel more stressed, fatigued and "out of balance." Laboratory research has shown that exposing living cells to the Schumann Resonance had beneficial effects when exposed to ambient EMFs, allowing the cells to increase their immune protection, and decrease the absorption of depression-inducing chemicals. Some researchers believe that by producing a 7.83 Hz signal we can counter the effects of the irritating man-made fields. By replicating the Earth's natural rhythm, we may be providing ourselves (at least in our immediate vicinity) with a more healthy environment. Research in Biophysics seems to suggest, that our biological system is "tuned into" the background frequency of our planet - the `Schumann Resonance'- a steady pulse of 7.8 Hz which beats around the planet within the earth/ionosphere cavity. It has been found that this is also the dominant brainwave rhythm of all mammals. Drowning out this natural frequency by overlaying it with manmade radiation noise, and in particular pulsed (digital) magnetic fields, can have devastating effects on our immune system, which is largely orchestrated by the release of certain neuro-transmitters and hormones within the human brain. By introducing interference signals, we create new previously unknown patterns, which thereby could set off new previously unknown auto-immune conditions.This could be likened to switches suddenly being turned on, which previously have been turned off and vice versa, leading to unforeseen consequences. Unless we accept the reality that the human brain is like a finely tuned electrical instrument, we will not be able to understand what is happening. The Schumann Resonances are quasi-standing electromagnetic waves that exist in the Earth's 'electromagnetic' cavity (the space between the surface of the Earth and the Ionosphere). Like waves on a string, they are not present all the time, but have to be 'excited' to be observed. They are not caused by anything internal to the Earth, its crust or its core.