This governor can supply power to 8 fans, and rotating the potentiometer can adjust the speed of 8 fans at the same time. The fan base supports 2P, 3P and 4P fans, and all 3 types of fans can adjust the speed.installation method: 1. The adhesive pad at the bottom of the governor can be glued and fixed in the chassis. 2. Make holes on the chassis according to the size shown in the figure, and the potentiometer can be fixed in the hole of the chassis through nuts. 3. Set the screw column on the chassis according to the size of the fixing hole of the circuit board as shown in the figure, and fix the governor on the screw column.Specification:Size: 62 x 45 x 26mmLoad current: 13ANumber of fan seats: 8Power supply voltage: 12VPower supply interface: 6 pinSpeed adjustment range: 0-full speedFan interface type: 2P, 3P, 4PColour: greenMaterial: PCB+plastic+metalPackage Contents:1 x Fan Speed ControllerOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.