It is performed using gold standard 808nm diode laser technology, with energy penetrates deep into the dermis with high average power and a rapid 10 pulse-per-second repetition rate to heat the hair shaft and hair follicle, rather than destroy the oxygen organization around hair follicle.Meanwhile, contacting surface cooling technology applied on the Sapphire Dual-Chill. Tip can eliminate the heat effect attributed to optical energy, greatly improving both the treatment performance and safety.