Silentwings 2 fan provides great performance to noise ratio and high reliability it achieves its virtually silent operation without sacrificing airflow and so offers the perfect balance between superior cooling and serenity as low as 158 dba its secret a unique airflow optimized fan blade design custom anti vibration mounts and a high tech fluid dynamic bearing with copper core for greatly reduced noise and super long life silentwings 2 fan is your perfect choice for any applicat