The 808nm diode laser,according to the principle ofselective photothermal absorption, penetrates the epidermis to the hair follicleThe laser energy is preferentially absorbed by the melanin in the hair which in turn causes the hair to lose its regenerative ability. At the same timeduring the treatment the sapphire dynamic cooling technology, make skin cooled in a short time. so as to ensure that the epidermis is not hurtedachieve the painlessrapic and permanent hair removal.