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