... .Large airflow.Environmental, no freon,no compressor. Mini face Portable air coolerSpecificationAirflow:4000m3/h Power Supply: ... of each conponentsCasing: modified PP plastics adopted, high strength, not easy deformation, ultraviolet ray and ageing ... freeWet curtain: imported paper adopted, good water absorption, high evaporation efficiency, specially formulated glue, greenness and environmental ...