Working PrinciplePhototherapy massage comb takes the heritage of the principle of Medridian Science in traditional Chinese medicine, owning the function of vibration, light therapy and massage. Main Functions28 soft massage tips in the comb will help massage the important acupuncture points on the head to promote blood circulation in the scalp and relax the head. Light TherapyWe provide 2 types of light therapy - blue and red lights to improve your hair quality, long-term use can effectively reduce hair loss and relieve headache and dizziness. Portable DesignPortable size allow you take it in your handbag or suitcase, you can use it for a daily hone use, before sleep or after a tiring work or drive, make you relaxed and comfortable. It is a best gift for yoursely, your parents, your friends, and others with hair issues..Items from Sheng Xinshun's shop