Thermaltake Riing Silent 12 Pro CPU cooler utilizes a specially designed 11 blade 120mm PWM fan that enhances airflow and produces an impressive cooling performance. Most importantly, the Riing Silent 12 Pro series is a true example of aesthetics in performance. Silent-operating hydraulic bearing guarantee ultra-low noise. The patented LED ring maintains uniform color and brightness. The lighting effect is visible from all sides and angles.