The Natural EMF Meter detects radio/microwaves and changes in extremely weak static electric and magnetic fields. Using both a needle type meter and audible tone, it detects: distant radio transmitters, geomagnetic storms, unusual magnetic solar activity, electrical activity of thunderstorms, and concealed surveillance bugs.

This EMF Meter is used by professional paranormal investigators. It can detect even the slighest change in the electro-magnetic fields.

Detects the electrical presence of a person. Sensitive to changes in electric fields of as little as 3 V/m with a full scale deflection at 1000 V/m. Will measure magnetic field changes as small as 0.5% of the Earth's magnetic field (2.5 mG) and as high as 100 microtesla (1000 mG). 9v battery included. One year manufacturer's warrantee.