air cooling fan 1.size:4inch 2.material:ABS&PP 3.fan parameters:5v,2.1W,2300RPM 5.Features:super quiet, 25000h ... air cooling fanSpecifications:MaterialABS&PPCertificatesCE,FCC,ROHS(optional)Colorpink,white,black,orange,grey,blue(customized color available)Power&Voltage2.1W(Max)/5VCurrent420mA(Max ... .Sofe wind, cool and refreshing, comfortable. personal mini USB air cooling fan