Quietness comes from a strong inner:Brushless DC Motor Wall Mountable Easy installation without drilling: Unconstrained, like a walking air conditioner Quiet Operation: Sleep with the soft natural wind. Desktop/Wall Mountable: Not limited supply/distance/space, just carry anywhere you like, enjoy the cool wind anytime. Seagull Design Five Flat Blades Make the wind softer: Ituses seagull fan blades to evenly cut the airflowand a circulation natural wind, avoiding the direct blowing feeling of traditional fans.