Premium quiet fan, 200x200x30 mm, 12V, 4-pin PWM, max. 800 RPM, max. 18.1 dB(A), >150,000 h MTTF Award-winning 200x30mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance Large 20cm diameter for high airflow at extremely low noise levels; 154x154, 170x170 & 110x180mm mounting holes for broad compatibility with various PC cases 4-pin PWM version for automatic speed control via 4-pin PWM motherboard fan headers, 350-800rpm speed range chromax. black. swap edition with all-black design and swappable red, black, white, blue, yellow and green anti-vibration pads for colour-customising (4 pads of each colour)