Features: 1.4 heat settings and 3 speeds: more precise styling possible. , 2. With smart memory function, it will start from your first choice set up, so no time is wasted. 3. Ten million negative ions (ten times higher than ordinary ion hair dryers). Frizz is reduced and hair remains silky smooth. In addition, ions can lock moisture in the hair, preventing the hair from breaking due to excessive drying.