1755nm for white skin (fine/golden hair) hair removal. 808nm for yellow (natural) skin hair removal. 1064nm for black skin (black hair) hair remove. 2Suitable for hairs of various parts of the body, such as the hairline of the face, lip hair, beard and body hair, chest hair, limb hair, bikini hair, etc. 3Selectively acting on the hair follicle, causing its temperature to rise sharply, destroying the hair follicle and its surrounding tissues. 4Destroying the hair growth center on which the hair grows, fundamentally terminates hair growth and achieves permanent hair loss reduction effect. 5Not only avoiding damage to surrounding normal tissues, but also shrink the pore which always worrying people. Make skin tender and smoothly.