... hair 3.natural blck color 4.rich glos comb and hair dye 1.unique comb design 2.more easy to be used for ... middle fingers to press the button,and make the comb tenoning appears amount of foam,Then comb and dye the hair .(this two button ... :safety,economical,efficiency and non-toxic,non-stick on scalp and do not fade,comb with fragrance,it's can comb and dye by yourself ...