The Multiwave Oscillator 
developed by Georges Lakhovsky around 1920, in conjunction with a bipolar Teslacoil.
Lakhovsky was sure that he would revolutionise the medical world with his device. The Multiwave Oscillator (patent published on 12.06.1934), however, was not recognised by the conventional medical faction, was opposed and finally dismissed as “quackery”.

The Energy Disc you find in the LINK is a passive antenna that is used without power supply.
The positive vibrations of the antenna are generated by Free Energy in the Golden Ratio and have a harmonising (balancing) effect on negative energies and negative vibrations.
To put it simply, negative (ill-making) energies are converted or transformed into positive (healing) energies in the effective circle of the antenna.

Learn more here:
https://biotraxx.eu/product/raumvital-golden-plated-energy-disc-100mm/?ref=stayhealthy