TECHNICAL INFORMATION The Compact Microbe Electrifier produces 4 or 40 hertz (cycles per second) alternating polarity output (pure square wave AC) using an 18 volt source which delivers around 16 volts at the skin to produce .13 milliamps (130 microamps) electrical current into the user when set correctly. The amount of current received is controllable by the user with a rotary knob. Unlike other units this one includes an electrical current detect circuit that turns on a red light when current is at or over the desired amount of .13mA. This amount of current is sufficient to kill/disable microbes in the bloodstream. The current is delivered through wet cloth electrodes. Proper operation of the unit and sufficient battery voltage is assured by seeing the red light flash on and off at 4 hertz. At 40 Hz the light should not blink. Output polarity switching is controlled electronically, not by a relay. This unit is powered by two replaceable 9 volt batteries.