The design inspiration was derived from huge engines on both sides of an airplane. The built-in air deflector makes the main body look simple and easy to clean. The unconventional air-out concept with independent air channels on both sides provides users with embracing wind, which stops straight blow and becomes more healthy. The internal two-centrifugal structure, meanwhile makes the body look thinner and be space efficient. The side ambient lights show operational status and indoor concentration of PM2.5 via different color variations. In addition, it also contains a detection and elimination for PM2.5 and formaldehyde, 17 dB quite technology.