Depending on the technology of IPL and bipolar RF, E-light operates on hypodermal and connective tissue. It stimulates collagen in different depths to rearrange and regrow. In this way, therapeutic effect is achieved. RF of bipolar release power simultaneously to make all kinds of injured tissue in cuticle and dermis photo-pyrolyzed with skin's characteristic that absorbs light energy selectively. With light possessing lower energy than that of traditional IPL, more energy is absorbed by all kinds of pigmentary and hemal injured tissue on the premise that cuticle is not damaged. According, the injured tissue is removed and therapeutic effect is achieved.