German Engineering - German Design - German Quality - German Performance Low-noise operation of up to 14.7dB(A) even at its maximum speed of 900 rpm Airflow-optimized fan blades, resulting in a whisper-quiet operation yet solid cooling Anti-vibration mounting system that prevents transmission of vibrations to your PC case Rubberized fan frame minimizes vibrations High-grade rifle-bearing technology that contributes to an operating lifetime of 80,000 hours Secure and easy installation of the fan with push-pins Product conception, design and quality control in Germany 3-year manufacturers warranty PWM controlled fan speed through the motherboard (PWM models only) Product conception, design and quality control in Germany 3-years manufacturers warranty Shadow Wings