Radioesthesia pendulum

The function of the pendulum is to make manifest, with its movement, a vibration of energy that the person is able to perceive. The pendulum amplifies this vibration, making it evident, and, if used wisely, its type of movement can give indications on the type of energy present, that is to say, a whole series of information and answers that depend on the sector in which the radiesthesist is doing the research.
For detailed information you can see the exhaustive page on wikipedia .