... ,and the skin also absorbs RF energy ,on the other hand ,the RF-surface-touch cooling technology removing the discomfort and complications ... get the effect.2.Application 1.Hair removal2.Skin rejuvenation ,wrinkle removal ,fact lifting .3.Removing freckle,age spots,sun ... :Gradel BF GradeCorrosion prevention liquid:ordinaryDo not use the machine in the environment mixed of flammable narcotic and air ...