Dimensions40x40x10mm(That is, 4010)BearingsMagnetic levitation motorWorking voltage 4.5V - 13.8VE lectricStream 0.15A 1.8WT ransferSpeed8500rpmWindVolume 9.5CFMN oiseAudio32dbaFrame materialsGlass fiber reinced plastics, PBTShell, PABlade, Environmental certificationSpecialPointBecause a special good bearing, have have the same speed of air flow, velocity. Is the first magnetic levitation motor with double ball bearing fan!