It is not a ray, but an electric wave, because the RF of Smeier beauty equipment uses RF's proprietary radio frequency transmitter to convert electrical energy into internal energy, most of which is converted into heat energy, and penetrates deep into the entire dermis. Increase the temperature, accelerate the blood circulation of the dermis and subcutaneous tissue, cause the fibrous tissue to be heated instantly to cause immediate contraction, stimulate the long-term regeneration and reconstruction of collagen, and achieve the effect of tightening and removing wrinkles