... ,Mobile 4)CE,CB,EMF,ROHS Functions and Feature of Portable air cooler ( air cooler,fan )1. Cool: It will blow ... the casters.7. Air purifier: At entryway,there is a filter so it can adsorb scrap garbage in the air such ... to find the water level in the box because of the red ball in front of the cooler. Newest portable air cooler with water