Phototherapy: The blue light aims to stimulate the scalp to improve hair growth, control oil and calm the scalp. Design: The comb features soft silicone bristles to promote blood circulation and wake up the scalp. Hair brush: Get a phototherapy scalp massager hair growth comb. Red light: Aims to promote blood circulation and collagen to improve growth and prevent hair loss. Portable: The compact size allows you to take this hairbrush with you anywhere! USB: Comes with a built-in-battery and is USB rechargeable. Phototherapy Scalp Massager Hairbrush | Living Social | Living Social