Very good. I have a friend who works in Taijiang Plastic Surgery Hospital as a radio station for face-lifting and wrinkle removal. It can heat the dermis without damaging the epidermis to achieve the effect of firming the skin. It will rearrange the collagen in the dermis to make it more compact. It will stimulate the production of new collagen and restore the elasticity of the aging and flabby face when it was young.