Feature: 1. LOW NOISE: This dual ball fan absorbs vibration and makes a maximum noise of only 28.8dBA, which is equivalent to the sound of a falling leaf, without disturbing your gaming and work. 2. DURABLE: Adopting ultra durable double ball bearings, high temperature resistant, long life, suitable for 24 hours continuous uninterrupted use, bearing life up to 50,000 hours or more. 3. PWM INTELLIGENT TEMPERATURE CONTROL: Adopting 4PIN PWM interface, the fan speed can be adjusted according to the operating environment, and the air speed can be up to 1800rpm. 4. 7 BLADE DESIGN: Featuring 7 high pressure fan blade design, the airflow is up to 44.2CFM at air speeds up to 1800PRM. This fan focuses on improving performance, delivering consistent air pressure and powerful airflow. 5. EASY INSTALLATION: The computer fan is compatible with all types of computer cases, easy to install. Humanized power supply interface design, ready to install and use, while using 82, 92mm double screw hole distance design (Note: hole distance is the distance between the center of the two screw holes) Specification: Item Type: PWM Case Fan Material: PBT Color: Black Product Size: Approx. 100x100x25mm / 3.9x3.9x1.0in Bearing Type: Double Ball Rated Voltage: 12V Rated Current: 0.1A ± 10% Rated Speed: 1800RPM±10 Airflow: 44.2CFM Noise Level: 28.8dBA±10%. Interface: 4PIN PWM. Package List: 1 x Fan4 x Screw Note: 82mm 92mm Double Screw Hole Distance: 82mm corresponds to 9cm fan mounting holes, 92mm corresponds to 10cm fan mounting holes.