Premium quiet fan 120x120x25mm 12V 4-pin PWM max. 2000 RPM max. 22.6 dB (A) >150 000 h MTTFNext-gen A-series design combines high airflow and high static pressure performance ideal both as a case fan and for CPU coolers watercooling radiators and AIO liquid cooling systemsState-of-the-art engineering (AAO frame Flow Acceleration Channels record tight 0.5 mm tip clearance) and construction (Sterrox LCP material metal-reinforced hub metal bearing shell etc. )4-pin PWM version for automatic speed control via 4-pin PWM motherboard fan headers 450-2000rpm speed range (near silent at idle powerful under load) chromax. black. swap edition with swappable red black white blue yellow grey and green anti-vibration pads for colour-customising (4 pads of each colour plus black anti-vibration gasket)