Be quiet has long since made a very good name beyond the manufacture of power supplies to anyone who likes to make their computer quiet. The fans of the Silent Wings series, for example, impressed with their high-quality workmanship and the innovative design, which made extremely quiet and yet efficient PC cooling possible. Be quiet! Now available in the Shadow Wings range, covering 80, 92, 120 or 140 millimeters in all popular fan formats, with both PWM fans and low, medium or high speed fans - depending on individual cooling and cooling needs of the customer. be quiet! Shadow Wings 2 140mm PWM 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:>b>Features:- Low-noise operation of up to 14.9dB(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- PWM controlled fan speed through the motherboard- Product conception, design and quality control in Germany- 3-year manufacturers warranty- Shadow Wings 2 fans are the perfect choice for all who appreciate maximum silence for their PC case.Specification:- Model: Shadow Wings 2 140mm PWM- Dimensions (mm): 140- Fan speed @ 12V (rpm): 900- Air flow @ 12V (cfm / m3/h): 49,8 / 85- Air pressure @ 12V (mm H2O): 0,58- Noise level @ 12V (dB(A)): 14,9- Dimensions (L x W x H), (mm): 140 x 140 x 25- Bearing technology: Rifle- Motor technology: 4-pole fan motor- Weight incl. fixed cables (kg): 0,175- Connector: 4-Pin- Cable length (mm): 500- Warranty: 3 Years