Dyson?s personal purifier fan is engineered to help improve your air quality. Its sealed filter combines an activated carbon and glass HEPA filter. Together, they capture gases and ultrafine particles from the air. It then uses Dyson Core Flow?technology to project cooling, filtered air ? precisely where you need it. Features: The first Dyson personal purifier fan. Purified air to cool you, with Dyson?s latest air projection technology. Cool with purified air. Not dirty air. Dyson?s personal purifier fan is engineered to help improve your air quality. It projects cooling, filtered air ? wherever you need it. Captures gases and pollutants. And keeps them trapped. The machine?s sealed filter combines an activated carbon and glass HEPA layer. Together, they capture gases and 99.95% of ultrafine particles from the air. Focused airflow, at your fingertips Precisely control your airflow. By adjusting the dome's position, you can angle the flow higher or lower. Dyson Core Flow?technology Only Dyson personal purifier fans use Dyson Core Flow?technology. This guides high-velocity air jets over a convex surface. They coalesce to project a focused stream of air. A comfortable night's sleep At night, you can set the sleep timer anywhere between 30 minutes and 8 hours. So you can keep cool and comfortable while you rest. Smooth 70? oscillation Set your machine to rotate from side to side, to deliver airflow through a 70? range. Easy filter maintenance Built-in reminders show you when your filter needs changing. It?s quick and easy to do, to ensure your machine is always working at its best. See your machine's status The LCD screen shows your airflow speed, modes and filter life.