Skin rejuvenation instrument[useful dosage] for external use. Apply proper amount to probe or treatment site. 1. Skin Rejuvenation Ingredient: collagen hyaluronic acid vitamin C ion exchange agent hyaluronic acid hydrating factor Colorless transparent gel, fragrance, no or a small number of bubbles. [special points of products] high light transmittance, strong thermal conductivity, no irritation to the skin, no damage to the probe, easy to use, no corrosion, no irritation, no