Advantages: 1. Hair removal, painless, more comfortable, more effective, 2. Water cooling + air cooling system, 3. Super power, long service life.1200W Power,American Coherent L aser Bar,100 Million Warranty,1200w high Power Test Report,Thermostatic Inelligent Refrigeration System,2 Filters, Quadruple Protection.Principle of Treatment The principle of diode laser hair removal treatment is based on selectivede-composition. The melanosomes in the hair follicle can selectively absorb the energy of the laser.