808nm system uses the unique laser with long pulse width 808nm to penetrate into hair follicle.Using the theory of selective optical absorption, laser can be preferentially absorbed by the melanin of hair. And then the hair shaft and hair follicle are heated rapidly in order to destroy the oxygen-supply organization of and around the hair follicle. The system’s unique super-cooling technology could bring about certain anesthetic effect to the epidermis with the output of the laser. Therefore, it could protect the skin from being hurt. As a result, a very safe and effective treatment is realized.