... head 4,weight:1.4kg PDT Skin tightening beauty equipmentFunction of PDT Beauty Equipment ----PDT3301.430nm blue wave:Wipe ... out whelk, macula, Folliculitis2.590nm yellow wave:Dispel spot , sunburn , senile plaques, skin care ... ; improve coarse pore, flabby skin, thin wrinkle, gray complexion.3.640nm red ...