Braun Satin-Hair 7 SensoDryer Built-in Thermo Sensors measure temperature 600x a minute and adjust to the optimal level for healthy-looking hair. Professional AC fan system gives a robust airflow that helps creating salon-looking hair. IONTEC technology provides extra shine and combats frizz and flying hairs. Braun Satin-Hair 7 SensoCare straightener Built-in Thermo Sensors analyze the hair 20x per second to detect the moisture level of each hair strand and automatically adapt to the ideal temperature for smooth and long-lasting styles without risking heat damage.