Multifunction Machine ELight+RF+Nd YAG Laser Elight: The E-Light technology fully combines the advantages of optical energy and radio frequency. With the impedance difference in skin and pre-heat produced when the skin selectively absorbs optical energy, the targeted tissue absorbs radio frequency with lower optical energy. So with a very low risk of side effects-pigment lesion, blistering-generally caused by higher optical energy, we are able to achieve good result with comfortable treatment. RF: It uses 1-40MHz radio frequency to alternate the electric field in the skin from positive to negative. It will produce heat under dermis then the initial collagen denaturation. The adjuvant therapy of 635nm Diode laser greatly promotes the RF treatment effect. Subsequent neocollagenesis then further tightens the dermal tissue and make the skin tightening, smooth and fresh! ND YAG laser: It uses the theory that specific wave length (1064nm or 532nm) of laser will be absorbed by specific pigment. The high energy of laser, absorbed by the specific pigment, could cause the pigment to swell and explode, partial fragments of the pigment will be shot out of the body, and the other pigment fragments will be removed by your body's immune system over a period of time. Because the normal skin absorb little energy induced by laser at the wavelength of 1064nm or 532nm, so the laser could s掳C~30掳C Coolingsemi-conductor cooling, water cooling, air coolingHandleone handle for Body Cooling Temperature-5~5 掳CEnergy5~450JMultifunction Machine website:http://www.topdiodelaser.com/multifunction-machine/