The mini ultrasonic scalpel Hifie uses the principle of ultrasonic thermal energy focusing to bypass the epidermis through the lattice cluster heat transfer mode. Without cutting the epidermis, the beauty probe of the ultrasonic scalpel sends out matrix molecular energy waves with vibrations as high as 600-120,000 times per second, which goes deep into the skin and damages subcutaneous cells. At the depth of about 1.6-4.5mm under the skin, energy directly acts on the deep fascia, and the RF electric field in the fascia layer forms the focal plane.