500-2200 RPM Delivers a Concentrated Airflow Generating Higher PC Performance for your Gaming PC 94 CFM, Static Pressure 3.27 mm H20 Dual Ball Bearing with a Rigid Brass Housing, Extends the Life Cycle of the Fan, Two-Plane Balanced to Ensure Stability 0-38 dBA with Auto START/STOP, Our Start/Stop Feature Allows for Ultimate Quiet and Power Savings 4 Pin PWM Connector, Anti-Vibration Pads Absorb and Eliminate Vibration