500-2500 RPM Delivers a Concentrated Airflow Generating Higher PC Performance for your Gaming PC 169 CFM, Static Pressure 4.7 mm H20 Dual Ball Bearing with a Rigid Brass Housing, Extends the Life Cycle of the Fan. Two-Plane balanced to Ensure Stability 0-47 dBA with Auto START/STOP, Our Start/Stop Feature Allows for Ultimate Quiet and Power Saving 4 Pin PWM Connector, Anti-vibration Pads Absorb and Eliminate Vibration