Premium quiet slim fan, 120x120x15 mm, 12V, 4-pin PWM, max. 1850 RPM, max. 23.9 dB(A), >150,000 h MTTF Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance 120x15mm slim design ideal for low-profile CPU coolers, HTPCs, ITX builds, space-restricted applications etc. 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, 1850rpm maximum speed (1400rpm with supplied Low-Noise Adaptor) Includes anti-vibration mounts, fan screws, extension cable and y-cable for running two PWM fans on the same header