Intensive LED hair brush features a gentle sonic vibration, red, and blue LED to help stimulate the scalp, boost hair growth/volume, and control oil production. Just like flipping your hair and vigorously massaging your scalp, brushing the hair now becomes a gentle massage that stimulates microcirculation in your scalp to bring nourishment to the hair follicle..Suitable for all hair types.Battery charging cord included.Vegan and cruelty-free.15 oz/ 444mL.For use on dry hair only.