... 5 Photons:Red,Blue,Green,Yellow,Purple and Laser PDT machine WY-T206Applied range:1.Improve symptoms suchas aging and loosening ... and so on.Blue light (470nm+/-10nm) is used to sterilize skin, mainly for sensitive skin with acne problems.Yellow light ... balance color pigment, lighten capillary expansion and so on. PDT Machine Technical Parameter: voltage100-240V 50/60Hz G.W. 22KGPacking 145 ...