Working Principle of the ICE Vmax Cryo-Synchronized HIFU Machine The ICE Vmax adopts cryo-synchronized high-intensity focused ultrasound (HIFU) technology. Its semiconductor refrigeration probe cools the epidermal surface while HIFU energy penetrates the epidermis and delivers 60–70℃ focal thermal points at targeted depths from 2.0 mm to 16 mm, covering the superficial dermis, deep dermis, SMAS fascia and subcutaneous fat layer. The thermal coagulation triggers collagen