High Speed FanHigh airflow for efficient chassis, heatsink and CPU cooling, and other applications that require extended performance margins and PWM auto-speed regulation. Ideal for computer ventilation, NAS and other equipment cooling fan replacements, and more. 4 Pin PWMSupport smart speed control, which can adjust the fan speed according to the temperature data provided by the motherboard. Enter BIOS to set the trigger temperature. Fan percentage operation can be set. 80mm case fan80 x 80 x 38 mm ( 3.15 x 3.15 x 1.5 inch ) Rated Voltage:12V Airflow: 80CFM Noise: 51 dBA Speed: 5800 RPM power8.5w. Dual Ball BearingThis high static pressure fan with dual ball bearings has a rated life of 50,000 hours and allows the fan to be mounted vertically or horizontally. Warranty & Technical supportwe are supported for one year to get a new replacement. We provide technical support and after-sales service. If you have any concer