cpufanhas a close relationship between voltage and adjustable speed. It is widely used in computer and home electric appliance due to its accurate speed adjustment, high power, low noise and low vibration. The specification is as following. Model Rated VoltageOperation VoltageRated CurrentRated SpeedAir SpeedStatic PressureNoiseBering System(V)(V)(A)(RPM)(CFM)(mmH2O)(dBA)YHWF-12038L1210.2 13.80.22200074.84.3238SleeveYHWF-12038M0.35250078.24.842SleeveYHWF-12038H0.5300085645Two Ball We candevelop thisDC Cooling fanif the user requires the non-standard specification.