Red light: Promotes and improves blood circulation, anti-inflammatory, detumescence, analgesic and diminishes pigmentation. It is suitable for allkinds of skin. Blue light: Improves to inhibit oil secretion,balance oil, and effectively sterilize. It is suitable for oily skin and acne skin. Yellow light: Relieves dry skin, enhances elasticity and delays aging. It issuitable for dry skin. Mixed light: Gathers a variety of light, sterilizes anti-inflammatory and delays aging. It is suitable for all kinds of skin.