Portable 2500W Power Smart Handle Triple Waves 755 1064 808nm Diode Laser Hair Removal Machine Working Principle The 808nm infrared laser penetrates the epidermis and reaches hair follicles in the dermis. Melanin inside hair follicles selectively absorbs laser light and converts light energy into heat energy. The temperature of hair follicles rises rapidly, causing irreversible coagulation of hair papilla and follicular stem cells. This cuts off nutrient supply for hair