... come with red ,yellow .blue ,green .UV violet Color available Theory :PDT LED medical treatment system, it is the newest high ... and ensures clients of “ultimate” skin freshening effects. When LED luminescence penetrates base skin layer,melanin is promoted in decomposition ... be 100% safe and highly effectiveNo UVA , No UVB , No Ultra-Violet , No InfaredNon-invasive, there is no downtime and no damage ...