Extreme airflow range for ultimate cooling and control. 2 Ball Bearing designed for high speed high performance. Better cooling and silent system performance thru PWM fan speed control. 15 aerodynamic design fan blades for better airflow and stability. 15 translucent blades (No LED for Translucent Black, Blue LED for Translucent Blue and Red LED for Translucent Red). This fan can also be directly connected to a standard mini 3 pin connector on the motherboard or fan controllers. Mini 4 pin connector, 3 to 4 pin Molex adapter and 4 screws included. Available in 80 mm, 90 mm, 120 mm and 140 mm. Available in Translucent Black, Translucent Blue and Translucent Red.