Fast Drying This hair dryer is equipped with a high-speed brushless motor of 180,000 RPM. Provide a powerful airflow with a wind speed of 36 m/s, it only takes 2 - 5 minutes to dry thick or long hair. Suitable for all hair types. Negative Ion Technology This ion hair dryer can release 500 million negative ions per second. These negative ions will attach to the surface of the hair, neutralizing the positive charges generated by friction on the hair, making the hair smooth, reducing frizz and split ends. This hair dryer is a built-in smart chip to control the temperature.