Ultra low noise fan 120x120x25mm 12V 4-pin PWM max. 1200 RPM max. 12.1 dB (A) >150 000 h MTTFNext-generation 120x25mm A-series design provides unprecedented quiet cooling performance ideal for CPU coolers and watercooling radiatorsState-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. )Ultra-quiet 4-pin LS-PWM version ideal for semi-passive setups (fan stops at 0% PWM) or ultra-low-noise applications that require PWM controlIncludes anti-vibration mounts radiator gasket fan screws extension cable and y-cable for running two PWM fans on the same header