.Bamboo-charcoal(silica gel contact) Bamboo charcoal silica gel had strong adsorption, which can not only sterilize ,but also be able to available clean up the cosmetic remains 2.Negative ions (electroplated coating) Besides cleaning skins , the multifunctional machine can also play the role of a delivery product, by which the skincare products can be effectively delivered into the skin. 3.Comfort (comfortable lines on the back) Give skin a massage, let skin get relaxed, in order to improve complexion, reduce fine lines ,as well as absorbing skincare products better.