The Radio-frequency (RF) utilizes 10MHz/S electric wave, which can permeate the epidermis to take effect on the underlying tissue. High-frequency shake will make resistance of the underlying tissue move and produce high energy, which makes the temperature of the underlying tissue rise instantly. Since high heat causes immediate contraction of fiber and collagen tissues followed by new collagen production and recombination, hence the desirable effects of skin-tightening, wrinkle-removal and figure-shaping, etc.