Advantages: 1. Hair removal, skin rejuvenation, painless, more comfortable, more effective 2. Super power, long service life. 3.Semicronductor + built-in water + Air Cooling triple cooling systems By properly adjusting laser wave length and pulse width, the laser can penetrate the top layer of skin and then reach the hair follicle. Then the light energy will be adsorbed and converted into thermal energy which can destroy the hair follicle. Thus the laser will make the hair lose its ability to regenerate while not destroying surrounding tissue.