The wavelength of CO₂ laser is 10.6μm, which can be fully absorbed by human biology tissue (all the skin are available). The sealed-off fractional CO₂ laser, whose output laser-light will be transferred by articulated arm, which has better sense of direction and higher energy density.The CO₂ laser operates in the invisible infrared waveband, and an aiming beam is required to see where the treatment beam will impact tissue more recently from a visible red diode laser. When the laser beam go through the focus lens, the produced heat will gasify the target tissue.With fractional laser resurfacing the laser beam is broken up or fractionated into many small micro beams which are separated so that when they strike the skin surface small areas of the skin between the beams are not hit by the laser and left intact. These small areas of untreated skin promote a much more rapid recovery and healing with less risk of complications. The small areas treated by the fractional micro beams, called micro treatment zones, cause sufficient laser injury to promote new collagen production and resultant facial skin rejuvenation.  Application(1) Remove acne and acne marks; (2) Eliminate dry pattern, fishtail, etc around the eyes; (3) anti-aging: skin firming, wrinkle removal, improve the skin condition; (4) Treatment of pigmentary lesions such as freckles and ostrum miracles; (5) Scar: treatment of depressed, old dispersion, convex vascular / fibrous scar; (6) Stretch marks.