Very Silent Work Excellent price/performance ratio. The Pure Wings 2 80mm fan even at maximum speed works at only 18.2dB(A). Perfect choice for quiet home and office computers as well as gaming and multimedia systems. OXtimized VENTYLATOR LADIES For even better cooling. Thanks to nine fan blades with optimized surface air flow is increased, noise-generating turbulence is minimized and air pressure increased. This function is the key to effective cooling. RIFLE TECHNOLOGY It gives the fan a very long lifespan. Pure Wings 2 90mm is synonymous with exceptional reliability. This is achieved thanks to the high-quality rifle bearing technology, which provides a very long lifespan of up to 80,000 hours.