the wavelength of co2 laser is 10.6, 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. it is the most beneficial skin recovery system and can achieve the long-term effect of collagen remodeling as well as improvement of aged skin conditions due to exposure to light. 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..syi