... skin corium, make skin absorb alimentation, stimulate renew arrange of collagen, at the same time of treatment, speed skin renew, and ... water required, lustration, sanitation, no side-effect, also can melt collagen, vitaminC into water, speed skin renew. The treatment depth controlled ... speed≥200m/sDimension32*35*93cmDischarged granule5~80μm PDT & LED beauty machine