1)Centrifugal Air Supply; 2)Three Speed; 3)Cools 600 sq. ft; 4)Portable evaporative cooling fan; Three Speed 1. Durable one-piece molded polyethylene housing.2. Centrifugal air delivery system.3. No need to install, portable, could be used immediately after connecting water and electricity.4. Efficient environmental protection, evaporated with water without harmful refrigerants5. Fresh air 2,400 ...