CFS (Corrector of functional state) – a unique development of Russian scientists, a product for medical purposes, the device is intended to protect against external aggressive electromagnetic radiations. CFS manufacturing techniques are akin to the organization principles of electromagnetic fields at a cellular level in a live organism.  CFS is logged by figurative harmonious information in rhythms of a magnetic field of the Earth and external space radiation.

It renders beneficial influence on an organism as a whole or its particular functions. Owing to that CFSs are the synchronizers of internal rhythms of an organism with the rhythms of an external field that is one of the basic criteria of health maintenance. CFS is also logged by the information necessary for counteraction to psychopower influences, and neutralisation of biopathogenic fields.

CFS can correct frequency characteristics of Hartman’s chart of the Earth (a lattice of power lines of acoustic-electric fields of the Earth). The information on CFS can vary depending on the functional purpose. On the basis of long-term research works on the use of Cirlian effect in the diagnostic purposes a Georgian biophysicist M.I. Shaduri says in his book:
"Elements of biosystem, organism structure communicate among themselves by means of images. The nature uses the same mechanism for distant interactions between organisms. The concept of health means harmonious work of all organs and systems, harmony with environment”. Therefore, a prerequisite of health recovery is the synchronisation of internal rhythms with the rhythms of an external field.