Great for a new system build or a cooling upgrade, the ENERMAX UCCLA12P 120mm Case Fan delivers outstanding performance with whisper-quiet acoustics at a friendly price. The PWM speed control keeps your system cool and silent all the time, while the Smart APS (Adjustable Peak Speed) control provides three peak rpm options for different situations. Batwing blade design and a carved halo frame increase airflow by 20%~30%. The white lightning LED can be on or off. Built to last, the twister bearing technology ensures a long lifetime with low noise for years of hassle-free use.