yes you are a genius once again. I would write a article about how devices can ruin EMF but I dont know all the tech parts like you do.
here this may help us explain it,
What is Static Electricity
Static electricity is the buildup of electrical charges on the surface of some object or material. Static Electricity can consist of extremely high voltage, this device can sense those high-voltage electrically charged objects at a great distance at a detection sensitivity as low as 500mV. Electro-static is usually created when materials are pulled apart or rubbed together. Basically, it is the imbalance between (+) positive and (-) negative particles on these objects or surfaces. Although the atoms on these surfaces are always full of charges, they become "electrified" whenever their pre-existing + and - charges are not equal. Some typical examples would be wool, plastic, or even the soles of your shoes as you walk across the carpet. This process causes positive (+) charges to collect on one material and negative (-) Charges on the other surface. An e-field Pod can be compared to a magnetic field, except that it's electrical in nature. Another way of looking at it is that an e-field is a voltage without a current, and whenever you have pure voltage, then you will have a pure electric field with no magnetism involved.
Keep in mind that during use that Static electricity is formed much better when the air is dry or the humidity is low. The E-Pod can detect static up to several feet when the air is very dry. When the air is humid, water molecules can collect on the surface of various materials and this can prevent the buildup of electrical charges and minimize the detection range considerably.
How to Use the E-Pod
Turn on the E-Pod and place the unit on a table or desk. The Green, Blue or Red light may or may not be illuminated at this time, it really depends on the “+” or “-” static charge around the E-Pod. Take a plastic pen or comb and rub it in your hair a few times. Now take the pen or comb and pass it slowly a few inches over the E-Pod. The comb or pen should have a negative “-” charge on it which will make the light turn on. Now you will notice that the light will begin to dim and then go out completely as the pen gets closer to the E-Pod. Move the pen or comb away, and the light will glow bright again. Depending on the humidity and other factors, the E-Pod can easily detect an E-Field charge up to 2-8 feet away.
Note: With a Negative charged condition, the light will remain ON and as a charged object slowly approaches the E-Pod, the light will begin to dim in relationship to the e-field strength and proximity to the static source. Eventually the Light will go off when the charge is within a few inches of the E-Pod. The light will slowly come back on again when the charged object moves away from the E-Pod.
Note: With a Positive charged condition, the light will remain OFF and as a charged object gets close to the E-Pod, the light will come on. It then turns OFF when the charged object is removed.
Important: The E-field Pod has been added to assist a Paranormal Investigator make an informed decision based on Electro-Static evidence collected during an investigation. When you are performing your investigation, team members will often refer to the “hair” standing up on their arms or the back of their neck. This added feature can help to detect this invisible E-field that causes this condition.
Tech specs:
E-Field Static Electricity Detection
E-Field Detection Range: 500mV to 700+Volts
E-Field Sensitivity: Positive and Negative Charges
Detection Range: Typically 2' for Negative charges at 40%RH. Up to 8' @ 20%RH or less humidity conditions
E-Field Indicator: Red Light is used as an E-Field Indicator.
Fast (100msec) Response To E-Field Fluctuations & Spikes
Glow in The Dark Design, E-Pods Glow for up to 24hrs. without Electricity!
Toggle ON / OFF Switch
9Vdc Operation (Battery Included)
So it reads disturbances in the static electricty around the device.