Pure Wings 2 120mm PWM fans bring famous be quiet! silent cooling to entry level computing yet are also appropriate for gaming and multimedia systems. Features Seven airflow-optimized fan blades reduce noise-generating turbulence Long life rifle-bearing gives an operating lifetime of 80, 000 hours Even at maximum speed, operates at only 20. 2 dB(A) PWM controlled fan speed through the motherboard German product conception, design and quality control 3-years manufacturer’s warranty Pure Wings 2 120mm PWM fans offer outstanding reliability and quiet operation at great price-for-performance ratio. They are the ultimate reason to put well-known be quiet! silent cooling in your PC. VERY QUIET OPERATION Achieves a great price-for-performance ratio The Pure Wings 2 120mm PWM fan operates at only 20. 2d B(A) even at maximum speed. The perfect choice for silent home and office PCs as well as gaming and multimedia systems. SILENCE-OPTIMIZED FAN BLADES For even better cooling Thanks to its surface-optimized fan blades the airflow is enhanced, noise-generating turbulences are minimized, and the air pressure is increased. This feature is the key to effective cooling. VARIABLE FAN SPEED FUNCTION Varies the fan speed and noise level of the fan Pulse Width Modulation (PWM) allows compatible 4-pin controllers - including those built into many motherboards - to intelligently vary the speed and thus the noise level of the fan. With PWM your system can ramp up the cooling when it’s needed or operate in maximum quiet mode when it’s not. RIFLE BEARING TECHNOLOGY Gives the fan a very long lifespan The Pure Wings 2 120mm PWM is the hallmark of outstanding reliability. This is achieved by its high-quality rifle bearing technology, which assures a very long lifespan of up to 80, 000 hours