Enermax Cluster Advance APS 120mm Case Fan Cooling, White UCCLA12P "TWISTER" Bearing Technology for long lifetime and low noise BATWING Blade Design and Carved HALO Frame for extra 20 ~ 30% airflow Patented Modular Frame with aluminum ring for enhanced stability of structure High brightness LED with a unique lightning effect Detachable fan blades for easy cleaning PWM speed control to keep your system cool and silent all the time. Smart APS (Adjustable Peak Speed) control providing 3 peak rpm options Batwing blade design and patented Carved Halo Frame design for extra 20 30 percent airflow Twister Bearing technology for long lifetime and low noise Detachable fan blades for easy cleaning Isolator-mounts for shockproof and easy installation 4 White LEDs with on/off switch