Radio waves are a word that you may not be familiar with, but they are often used in medicine and beauty.
Radio waves (RF) is an abbreviation for Radio Frequency, and refers to high frequencies (electromagnetic waves) that are safe for the skin. The reason why this electromagnetic wave has a slimming effect is that it vibrates fat cells by applying high frequency to the body.
In radio waves, high frequencies are generally said to reach up to about 2 centimeters from the skin.
The Joule heat (biological heat) generated from the vibration warms the body from deep inside and activates the cells.
To put it in simpler words, it is an image of "warming the body by generating fine frictional heat with high frequency".
