ipl & Rf hair removal 1, speckle and spot removal 2, skin whiten 3, port design 4, 1 year warranty ... vein ,shorter pulse width; Hair removal rule: 1.Darker hair, longer pulse width; Lighter hair, shorter pulse width. 2. Thicker hair, longer delay, lower energy ... 3. Thinner hair, shorter delay, higher energy 4. Denser hair, lower energy; rarer hair, higher energy 5. Darker skin, ...