... tank ,45L 4,environmental air cooling fan 5.With CE Portable air cooling fan for factory OFFICE 1, Parameter ModelXBL- ... and smell, improve the air quality. 3,The advantages of Portable air cooler: FunctionVarious functions of filtering,ventilation, air circulating, ... conservation; an infrared remote control function 5,The principle of Portable air cooler: The cooling process works on the principle ...