Cougar Vortex PWM 120 Cooling Black

* Fan Size: 120mm * PWM stands for Pulse Width Modulation. The 4-Pin connector allows the mainboard to control the fan speed from 800-1500RPM. * Optimum airflow, air pressure & extremely silent performance * Innovative blade design focus air flow & optimum cooling efficiency * Reduce the vibrations efficiently & silent operation * Air-inlet with optimal aero-dynamical design reducing noisy air turbulences * HDB runs more smoothly with no friction, make it quietly & durability(MTBF300,000hrs) * Rubber fixed pins also reduces vibrations (fan run more quietly) and Tool-less makes it easy to mount, with no tools required