The be quiet! Silent Wings Pro 4 is a distinguished solution for enhancing your computer's cooling system while keeping noise to a minimum. Designed by Listan, this case fan is equipped with a fluid dynamic bearing and pulse-width modulation (PWM) support for efficient operation and optimal airflow. It comes with a 50 cm cable and a 25 mm height, ensuring compatibility with a broad range of desktops and servers. The installation process is simplified with the inclusion of 4 push pins and 4 screws, suitable for both newcomers and seasoned PC builders. Additionally, its adherence to RoHS, TUV SUD, UKCA, WEEE, and cURus standards highlights a dedication to environmental responsibility. The Silent Wings Pro 4 focuses on effective cooling with an emphasis on environmental consciousness.