4. Create moisturizing skin.Moisturizing effect of mask is clear, and skin care is no longer based on feeling 2. Is your skin up to standard?The normal value of moisture in the face area is different in winter and summer. When your skin is dehydrated, the screen show a red light.When the moisture is normal, it show yellow; When the moisture is good, it appear green. 3. Your skin specialist.Deeply understand your skin condition to choose skin care products suitable Feature: 1. Skin moisture detector. This detector can always pay attention to skin health problems.It can detect moisture, oil and elasticity problems, and then judge the skin age.In addition, this detector can also detect fluorescent agent problems 5. Fluorescent agent detection.When the product contains fluorescent agent, appear blue, indicating danger; Products that do not contain fluorescent agents not appear blue