Premium quiet fan, 120x120x25 mm, 12V, 4-pin PWM, max. 1200 RPM, max. 17.8 dB (A), >150, 000 h MTTF ^^ Award-winning third-gen 120x25mm S12 fan with Anti-Stall Knobs and Advanced Acoustic Optimisation frame for superior quiet cooling performance ^^ Airflow-optimised design for highly efficient, near-silent ventilation of PC cases and other chassis (intake & exhaust), cabinet cooling, etc. ^^ 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 300-1200rpm speed range (900rpm max. with supplied Low-Noise Adaptor) ^^ Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and y-cable for running two PWM fans on the same header