I am printing up a little booklet to go with each tester which will be included under the same total price. The pen is a simple device which lights a red light if an oscillating magnetic field is present in the same intensity range or greater than that employed for acclerated healing in my clinics. Theoretically these sine wave type fields generated by common household appliances may have effects on human tissues and immune systems, but that has not yet been proven in my labs or clinics. An interesting footnote is that the light dimmer system I tested output square wave forms similar to therapy wave forms when an oscilloscope probe was brought nearby. Digital equipment such as computer may or may not generate such square waves.
Line voltage is sine wave shaped.
A second footnote is that the Japanese have developed an electric blanket design which rectifies the A.C. into D.C. before it heats the blanket or gets near a human, thus NO wave forms of any shape or frequency are developed by that type electric blanket. YOU will have to draw your own conclusions. My research clinically revealed that strong magnetic field oscillations had little to no effect which were observable with ultrasound scanners, but tiny gentle seeming near nothing fields induced tremendous accelerated healing effects with immediately observable deep tissue changes. Modern power transmission lines with skilful use of grounding principles seem to NOT generate field effects. Modern inhouse wiring also seems to NOT generate any field effects which are detectable as within the Therapeutic Intensity Range.