The RF industry tries to tell you through animations and pseudo science that they can heat the dermis to a point that it will create new collagen. To do this, and not either injure the epidermis or the deeper fat is very difficult. Also, collagen production and contraction occurs best when there is coagulation, which none of the non penetrating RF devices can do. The Infini can treat at a specified depth to the point of coagulation. Very simply, the Infini has made most RF devices obsolete. Please read my blog and see video, Steve Weiner, MD, Facial Plastic Surgeon.