Widely used in packaging, printing, food, electronics, instrumentation, clothing industry production lines as a speed-regulating drive device There are 6 wires for the speed regulator, the red wire is the main motor (power wire), the green and white are the capacitor secondary wires, and the two blue are the speed control feedback wires. The yellow wire is the ground wire The action switch only controls the action or stop of the motor, and is not used for power interruption. Please turn off the power if it is not used for a long time To change the direction of the motor, just change the jumper between "CCW" and "CW" on the terminal block on the back of the controller colour: as shown Material: ABS Package Contents: 1 x 500W Motor speed controller Only the above package content, other products are not included. Note: Light reflection 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.