Germanium Diode Microphone

-  Based on the theories of Dr. Konstantin Raudive.  Dr. Raudive pioneered the use of diode and crystal radios/microphones for EVPs

-  Metal case acts as a Faraday cage.  The Faraday cage helps to reduce contamination from outside radio interference

-  Connects to recorder microphone inputs

-  Now with external grounding capabilities

-  Cables included

-  As this product is an experimental device, we cannot guarantee results

** Digital recorder not included**