When the cartridge acts on the skin up and down, themicroneedle pierces the epidermis and opens thousandsof fine channels. At this time, the essence liquid willautomatically penetrate from the applicator and reachthe deep skin evenly, with the absorption rate up to90% higher than that of manual application. With thefunction of microneedle, the skin tissue repair can bequickly started, stimulate cell regeneration, restore thevitality and elasticity of the skin, and double thehealing effect.