Brand ARCTIC, Model ACFAN00213A 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, 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, TWO WAY INSTALLATION: Blow warm air out of the case, draw cool air into your case, 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 TECHNICAL DATA: Fan speed: 150-1800 RPM, Airflow: 43 CFM/73;1 m³/h (@ 1800 RPM), Noise Level: 0;4 Sone (@ 1800 RPM), Pin: 4-pin,