Symphony Pro PS-1 Harmonic Resonator. Asset or snake oil?

No one understands what harmonic resonance is. Maybe this would be a good starting point for anybody selling this product. Absolutely horrifying.

jumia"No one understands what harmonic resonance is. Maybe this would be a good starting point for anybody selling this product. Absolutely horrifying."

Please explain why you are horrified I hope you are not too frightened I am sure some here will be able to help you please reach out.

A clear explanation is found here:

 https://www.physicsclassroom.com/class/sound/Lesson-4/Fundamental-Frequency-and-Harmonics

ADD-Powr is making a claim or an assertion partially based upon this and the Fourier harmonic series: 

https://en.wikipedia.org/wiki/Fourier_series#:~:text=A%20Fourier%20series%20(%2F%CB%88f,be%20determined%20using%20harmonic%20analysis.

They also have a useful animation video that attempts to explain their idea.