The Emjoi Colorjoi is a revolutionary home root and hair coloring system. It is an amazing hair coloring brush that dispenses hair color onto your hair as you brush. The Emjoi Colorjoi can be used to color roots, for all over coloring, covering grays or adding streaks of color. It works with any permanent or semi-permanent hair color and gives yoiu salon quality results at home - without the mess. The Emjoi Colorjoi is battery-operated (2-AA), easy to use and comes with a full head coloring attachment, root coloring attachment, and an instructional DVD.