According to the Super High Frequency Manual dated 1930, "it stimulates and regulates the circulation of the blood, forcing it to carry away the waste and poisons from the body. It vitalizes or brings back to normal the many thousands of tissues throughout the body. It quites the nerves equalizes the circulation and restores normal rest, followed by pleasant and refreshing sleep. It also increases intake of oxygen through the pores, causing them to throw out impurities and breathe, or take in oxygen. And most important of all, IT GIVES A GENERAL REJUVENATION OR "TUNE-UP OF THE ENTIRE BODY."
Renulife Violet Ray (1930 Manual)
Nikola Tesla, who discovered a way to diffuse high-frequency current into a discharge of mist, enabled creation of the “violet ray,” which gained great popularity in the 1920s.32 A variety of devices using these rays and glass elec-trodes promoted the idea of “cellular massage” to build up tissue resistance.
For those who need a simple definition of Violet rays, this is it.