air cooling fan 1.size:4inch 2.material:ABS&PP 3.fan parameters:5v,2.1W,2300RPM 5.Features:super quiet, ... 25000h working life personal mini USB air cooling fanSpecifications: ... switch, its angle can be adjusted up and down by 360°.7.Dimension: 149.73*96.3*146.5mm,weight: ... wind, cool and refreshing, comfortable. personal mini USB air cooling fan