Define the starting voltage: make "Waterproof Cooling Fan" normal operation voltage at the lowest voltage. Starting voltage means less fan static friction coefficient is small, and the speed of the fan is running smooth and stable, choosing "Waterproof Cooling Fan" is a special need for this requirement. At rated voltage stable operation of the fan current, the current representation symbols: I, Unit: A (amperes), 1A = 1000mA. In the case of thermal performance to ensure that the current smaller the better, the less energy it consumes, and also benefit "Waterproof Cooling Fan" of life.