Air Series AF140 LED Blue Quiet Edition. Corsair Air Series LED high airflow PC case fans combine efficient low-noise airflow with striking LED lighting. The blades are custom-molded for optimal airflow and they"re ultra-thin for less noise and turbulence. The sleeved bearing system reduces vibration for quiet operation. The fan blades are translucent with a frosted texture so the light from the four LEDs adds a dramatic effect.