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 World-class quiet and solid cooling be quiet! Shadow Wings 2 140mm offers whisper-quiet operation and reliable cooling at low revolutions per minute. It is especially recommended for use in very silent PC builds.Shadow Wings 2 fans are the perfect choice for all who appreciate maximum silence for their PC case. Performance Bearing type Rifle bearing Maximum air pressure 0.58 mmH2O Airflow 85 m³/h Maximum airflow 49.8 cfm Noise level (high speed) 14.7 dB Rotational speed (max) 900 RPM Compatible