Feature: 1. Ultra Quiet Operation: Dual ball bearings absorb vibrations, reducing noise to just 26.7dBA, equivalent to the sound of rustling leaves. Say goodbye to disruptive noise during work or gaming. 2. Dual Ball Bearings: The cooling fan uses ultra durable double ball bearings. High temperature resistance, long life, suitable for 24 hours continuous uninterrupted use, bearing life up to 40,000 hours or more. 3. PWM Intelligent Temperature Control: Using 4PIN PWM interface, fan speed can be adjusted according to the operating environment, wind speed can be up to 2500rpm fan speed, reduce noise. 4. Efficient Cooling: 7 blade design produces a maximum airflow of 21.15CFM at 2500PRM, focusing on improving performance to deliver stable air pressure and powerful airflow. 5. Easy Installation: Compatible with all types of cases, user friendly power interface design, and convenient 50mm screw hole spacing (Note: hole spacing refers to the distance between the center points of 2 screw holes). Specification: Item Type: Computer Case Fan Material: PBT Color: Black Size: Approx. 70x70x15mm / 2.76x2.76x0.59in Bearing Type: Dual Ball Rated Voltage: 12V Rated Current: 0.07A±10% Rated Speed: 2500RPM±10% Airflow: 21.15CFM±10% Noise: 26.7dBA±10% Interface: 4PIN-PWM. Package List: 1 x Computer Case Fan 4 x Screws