Red Light Therapy Hat 660nm & 850nm Hair Loss Treatment Cap Hair Growth Regrowth Mode 3: Red Light 660nm + Infrared 850nm. Mode 4: Violet Light (660nm + 450nm + 850nm). Mode 1: Red Light 660nm. Mode 3Red Light 660nm + Infrared 850nm. Mode 4Violet Light (660nm + 450nm + 850nm). Mode 1Red Light 660nm.
