Item Type: Cooling Fans Inner Ring Diameter: Approx. 10.8cm / 4.3in Outer Ring Diameter: Approx. 12cm / 4.7in Bearing: Hydraulic Rated Voltage: 12V Rated Current: 0.17 ± 0.03A Speed: 1200(±10%) RPM Fan Blades: 11 Noise Level: 19.5dBA MTBF: 20,000 hours Interface: 6pin Remote Control Battery: 150mAh CR2025(not included) How to use: 1. Turn off the power of the computer, open the case, and find a suitable interface that can be connected to a large 4pin 2. The big 4pin of the adapter cable is aligned with the interface and inserted 3. Insert the red end of the adapter cable into the red port of the controller 4. Align the 6pin of the cooling fan with the applicable 6pin interface of the controller and insert 5. You can use the computer when you turn it on 1、The cooling fan has 11 blades, the speed can be 1200rpm, the air volume is large, and the heat dissipation effect is good. 2、Made of high?quality thick material, and the outer frame is sturdy, which can effectively protect the fan from deformation. 3、With shockproof and silent design, there will be no noise during use and will not affect the work. It is very suitable for office use. 4、The ARGB controller in the kit has multiple interfaces of different types, which is more versatile and practical, reducing wiring troubles. 5、The remote control can be used to control the fan speed, light mode and brightness, and the operation is simple. 3 x Cooling Fan 1 x ARGB Controller 1 x Remote Control(without Battery) 1 x Adapter Cable