1.Ref.: Laser for Hair Removal in Raleigh: Selecting the Best Laser for your skin type, Michael Law, MD, Raleigh-Durham Plastic Surgeon；Ref.: Illumination Geometry:The Importance of Laser Beam Spatial Characteristics, KURT G. KLAVUHN, PHD, Research Scientist, Pleasanton, California. 2. Laser with 755nm wave length was clinically proven to achieve the best absorption result by melanin, the most effective laser with the best laser hair removal result. Ref.: Laser for Hair Removal in Raleigh: Selecting the Best Laser for your skin type, Michael Law, MD, Raleigh-Durham Plastic Surgeon; pulse width refers to the measurement of time that a laser hair removal machine emit laser energy, the shorter the pulse width, the highest the energy emitted, achieve the more effective permanent hair removal result.Compare with other hair removal technology, energy emitted by MediLASE PRO-U™ 24mm is more convergent and penetrate deeper to the follicles, more effective to permanently reduce black hair growth. Every treatment will help remove 20% of hair with melanin*, 4-6 treatment sessions in 1 year will stop visible black hair from growing. A Report on the "Safe and Effective Device For Permanent Hair Reduction" from FDA Certified 510(K) Summary.*After completion of treatment, black visible hair will be removed and the result varies in different people, due to unbalance hormone production or menopause, a small amount of extremely fine with light color hair may grow.4. The larger the spot size, the highest the energy emitted Ref,: Illumination Geometry: The Importance of Laser Beam Spatial Characteristics, KURT G. KLAVUHN, PHD, Research Scientist, Pleasanton, California.5. The pulse duration of MediLASE PRO-U™ 24mm is 10Hz, 5 times faster than previous model GentleLase Pro ™ LE.