Widely used in packaging, printing, food, electronics, instrumentation, and clothing industry production lines as a speed-regulating drive device. The speed regulator has 6 wires: the red wire is the main motor power wire, the green and white wires are the capacitor secondary wires, the two blue wires are for speed control feedback, and the yellow wire is the ground wire. The action switch controls only the operation or stop of the motor and is not intended for power interruption. Please disconnect the power supply if the device is not used for an extended period. To change the motor direction, adjust the jumper between "CCW" and "CW" on the terminal block located on the back of the controller. Color: as shown. Material: ABS. Package Contents: 1 x 500W Motor Speed Controller. No other items included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.