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808nm diode laser hair removal technology is based on the selective dynamics of light and heat. the laser goes through the skin surface to reach the root of hair follicles; light can be absorbed and converted into heat damaged hair follicle tissue, so that hair is removed naturally without injury picosecond laser device uses very short pulse output mode, instead of thermal effect, by the principle of light mechanical shock wave, pigment is "shattered" into finely granular via focused energy, are more likely to be absorbed by the body metabolism. opt takes optimal pulse opt and bipolar radio frequency electromagnetic wave with special width-spectrum,selectively acts on target texture, to do skin rejuvenation, freckle removal, hair removal, wrinkle removal effectively..syi