iKeener Hair Growth Laser Comb[iKeener Massage Photo therapy Hair Growth Comb]: A multi functional portable grooming comb for hair medications for people with hair loss. It is really combined with hair regeneration fluid and has a de greasing effect, prevents hair loss and nourishes the hair. Promote blood circulation, promote hair regeneration and make the hair thicker and fuller. [Working principle of application]: promote blood circulation to the head through red light therapy