... the growth of collagen while overcome side effect of IPL treatment(IPL and laser):not enough energy penetrating depth and possible pigmentation ... Spectrum: 560~1200nm (green button) 640~1200nm(yellow button) (430nm,480nm,530nm,585nm, 690nm for option)e Energy density: 0-50J/cm2 ... System.P Power supply: 220 V Ac, 50Hz/60Hz A.Portable design,Trolly Design&Vertical design for OptionB.Hand-piece design ...