When connected to an ohmmeter and a magnet brought near, you'll see the ohms reading fluctuating. If you connect to a data logging millivolt, meter or data logging ohm and you put the item in motion you can detect buried metal objects and magnetic anomalies. When connected to very sensitive amplifier of 0.1 Hz to 30 Hz you can see geomagnetic storms.
The unit will also detect cars and trucks going down the street due to the metal contained in the vehicles. This item is in the category "Business & Industrial\Test, Measurement & Inspection\Test Meters & Detectors\Metal Detector Accessories". The seller is "jack_frost_sales" and is located in this country: US. This item can be shipped to United States.