INNOVATIVE DESIGN: Design of fan blades improves airflow and facilitates efficient ventilation, impeller was designed with a focus on minimzing the noise level yet delivering the desired airflow and pressure%ocs%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%ocs%TWO WAY INSTALLATION: Blow warm air out of the case, draw cool air into your case%ocs%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 higher service life%ocs%TECHNICAL DATA: Fan speed: 300–2000 RPM, Airflow: 31 CFM/52.7 m³/h (@ 2000 RPM), Noise Level: 0.3 Sone (@ 2000 RPM), Pin: 4-pin