Silent Wings 2 fans are our state-of the-art fan series & provide the greatest performance-to-noise ratio & highest reliability on the market. They achieve their virtually silent operation without sacrificing airflow, & so offer the perfect balance between superior cooling & serenity. Their secret: a unique airflow-optimized fan blade design, custom anti-vibration mounts, & a high-tech fluid dynamic bearing with copper core for greatly reduced noise & super-long life. Silent Wings 2 fans are your best choice for any application that requires ultimately quiet operation & uncompromised performance.