... (epidermis, dermis, fat layer, muscle layer), 20Hz on the muscle layer, 450KHZ on the collagen layer, 12MHZ on the epidermis. ... skin becomes more elastic, tight and delicate after 1-12 treatments. Frequency hopping instrument for Medical and cosmetic ... the skin, act simultaneously on epidermis, fat layer, collagen layer, muscle layer Advantages of frequency hoppingPainless treatment No rebound ...