Laser emitted by the system has a strong penetration ability which allows it to reach the deep layer of dermis. The pigment particles absorb the light energy and explode sharply, burst into the tiny pieces, thus diminish the color density and get rid of it. SHR acting on the 15mm depth of surface, plus RF to prevent hair growth without hurting the sweat glands. Naturally the hair will be never grown for the hair follicles closed, and having no melanin. Generally, there are 3 periods of hair growth: Growth Phase, Maturity Phase, Dormancy Phase, and the treatment will be most effectively in hair’s Growth Phase, so patients need do the treatment 3-4 times to achieve permanent hair removal.