Premium quiet fan, 80x80x25mm, 12V, 4-pin PWM, max. 2200 RPM, max. 17.7 dB(A), >150,000 h MTTF Award-winning 80x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance 8cm format is ideal for compact PC cases (HTPC, ITX, Small Form Factor) and other chassis (intake & exhaust), replacement fan for NAS and other devices, etc. 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 450-2200rpm speed range, stops at 0% PWM for semi-passive systems 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)