Comes with 2 IceGALE 140mm Black Fans 4 Pin PWM Connector, 0 - 36 dBA with Auto START and STOP 500-1600 RPM Transports Airflow Aerodynamically, this Concentrated Airflow Generates Higher PC Performance 96 CFM, Static Pressure 2.65 mm H20 FDB (Fluid Dynamic Bearing) with Rigid Brass Housing, Two-Plane Balanced to Ensure Stability Better Stability with an Aft Magnet at the End of the Housing Shaft