... Fan(Brushless DC Fan, DC Fan, Blower Fan) for 20 years. Have UL,CE,TUV,RoH DC Brushless Fan(Brushless DC Fan, DC Fan, Brushless Fan,cooling Fan,Blower Fan ... system: B----ball bearing or S----sleeve bearing Operating temperature:-10 to+70Storage temperature:-40 to+70Opreating voltage:rated voltage±15%. Dimension ...