... injuires to recover/Treat oily skin. Galvanic:Lead in nutritions/Lead out waste... General Introduction: RU- ... pores, relieve inflammation.Negative ion can lead in alkalescent essence,dissolve the grease on skin surface ... minutes. For dry skin, please do it in low intensity in short time. For oily skin, the ... frequency on an area for too long time, in case of burning the skin. Please adjust the intensity ...