... anything spraying for a long time CE,CCC,ROHS,CQGC Fog machine&sprayer&disinfector&disinfecting atomizer:Diameter: 18'', 20'',24'' ,26'' ,30 ... long distance, the capacity of water tank is large.cooling and dust reduction.It's used in the the outdoor places ... ,such as : the plant, garden and so on.Certification: CE,CCC,ROHS,CQGC Fog machine