The Braun Satin Hair Brush with IONTEC is unique. While others have ions only buried in their material, the IONTEC Brush actively produces them in millions & pushes them out through the little green jet. You can even hear it work with a quiet hiss. All those ions infuse your hair & beat static & frizz for instantly visible shine. & they help transport the moisture of the surrounding air back into the hair. Which is a very healthy thing to do.