This listing comes with 4 Leonardo tuning forks, pamphlet and velvet carrying bag. How To Hold and Tap Your Tuning Forks
from John Beaulieu
The Leonardo Set of Tuning Forks from Biosonics uses da Vinci's Vitruvian Man and the geometric proportions of the human body to create this set of tuning forks. Leonardo saw the body as a microcosm of the universe.
To use these forks, hold the C256 fork in one hand and one of the other three forks (F, G, or A) in the other hand. Activate the forks and bring them 1" to 3" from your ears, meditating on the blending of the two tones.