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. Key features include: 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 manufacturer’s warranty Shadow Wings 2 fans are the perfect choice for all who appreciate maximum silence for their PC case. Features  Very quiet operation Low-noise operation due to high-quality rifle bearing. The parallel arrangement of recesses on the outer side of the bearing shaft ensure uniform circulation of the high-quality oil and make the fan very quiet. Mechanical noise is minimized by antivibration fasteners and the rubberized fan frame. The high-quality IC motor controller reduces electrical noise sources. Long service life Reliable cooling for up to 200,000 hours thanks to the high-quality rifle bearing. High air flow The flow-optimized surface structure of the fan blades produce more air flow in combination with smooth running. Simple assembly Screwless installation makes handling simple. Service 3 year manufacturer guarantee.