Premium quiet fan, 120x120x25 mm, 12V, 4-pin PWM, max. 1500 RPM, max. 22.4 dB(A), >150,000 h MTTF Award-winning 120x25mm fan with Focused Flow frame for high static pressure and superior quiet cooling performance Ideal for CPU heatsinks (e.g. Noctua NH-U12(S) series) and water cooling radiators, perfect replacement fan for loud all-in-one (AIO) coolers 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 300-1500rpm speed range (1200rpm 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