ARCTIC Cooling 4-Pin PWM Fan with Standard Case - 1 x 92 mm - 1 x 43 CFM - 23.5 dB(A) Noise - Fluid Dynamic Bearing - 4-pin PWM - Plastic - Retail AFACO-090P2-GBA01

Long Service Life The Fluid Dynamic Bearing comes with an oil capsule that avoids lubricant leakage. Thus this bearing is as quiet as a sleeve bearing but comes with a significantly higher service life Perfect Case Fan Regulation with PWM The PWM function allows the motherboard to run the fan precisely at its necessary speed. This guarantees the required cooling and minimizes the noise level. Innovative Design Enables Quiet and Efficient Ventilation The innovative design of the fan blades improves the air flow and facilitates a highly efficient ventilation. The impeller was designed with a focus on minimzing the noise level yet delivering the desired airflow and pressure.Two Way installation Blow warm air out of the case Draw cool air into your case