The Dyson Supersonic Hair Dryer is engineered for different hair types and features a V9 digital motor that spins up to 110,000rpm. This propels up to 13 litres of air up to the amplifier every second for powerful results when needed. The Air Multiplier technology airflow is amplified to produce a controlled, high-velocity jet of air for fast drying. It's intelligent heat control helps protect your shine. The Supersonic Hair Dryer also features Intelligent heat control to help protect your shine. It measures air temperature over 40 times a second and regulates the heat. This prevents extreme heat damage, to help protect your hair’s shine.