Magnetic Bearing Harnesses magnetic levitation technology to provide lower noise higher performance & a longer lifespan Custom Rotor Design Delivers the perfect balance between high static pressure & high airflow operating flawlessly in the most challenging environments Extensive Control Range A 2000 RPM PWM control range gives you total control between low noise & absolute performance. With a 2000 RPM control range The ML Series fans deliver total control between low noise & airflow without compromise. Contents & Specifications Package contents (x 2) ML120 120mm PWM Premium Magnetic Levitation Fan. Fan mounting screws. System Requirements Motherboard with an open standard 4-pin fan connector