1Light Irradiation: Scalp applicator comb with red LED light irradiation, can conserve hair follicles, promote cell metabolism and accelerate circulation. 2Scalp Relaxing: Hair massage comb adopted high frequency vibration to relax scalp and relieve tension, effectively promote liquid absorption. 3Deep Penetration: Scalp massage comb adopted ball press comb teeth, make the liquid deeply penetrate into the scalp, 12ml water tank can be detached. 45 Gears: Scalp applicator comb adopted micro current stimulates the scalp, with 5 levels can be adjusted, which can promote black and thick hair growth. 5Hair Repairing: Hair growth comb adopted negative ion to repair hair surfaces, with antioxidant and prevent aging function, help to reduce blood viscosity.