Dries hair with smooth, controlled airflow, helping to create a smooth, natural finish. It's small, powerful Dyson digital motor V9 combined with Air Multiplier technology, produces a high-velocity jet of controlled air, for the fastest drying and precision styling. Prevents extreme heat damage to help protect the shine. Intelligent heat control measures the air temperature over 40 times a second, to prevent extreme heat damage. Dyson Supersonic Hair Dryer is engineered to be kinder to fine hair and sensitive scalps, the new Gentle air attachment diffuses the air, creating a gentle, cooler airflow - while still drying hair fast.