Features This motor speed controller is suitable for AC220V 50/60HZ motor. Environment temperature: - 10 ~ + 50℃,Relative humidity:<90%; The range of speed regulation is 90-1400r/min 50HZ, 90-1700r/min 60HZ,black wire is the motor main wire, red and white are the capacitor auxiliary wires. Wide Applications: This motor speed controller is suitable for packaging, printing, food, electronics, instrumentation, medical equipment, clothing industry production line for speed control drive devices Durable Materials: The speed regulator uses high quality electronic circuit and integrated components for durability.when changing direction, do not change the direction until the motor stops running completely Good Working Performance：This motor speed controller has small size, high precision, wide speed controlling range, and long service life. Specifications: Power supply: AC220V 50/60hz Rated power: 400W Environment&nbsp; temperature: - 10 ~ + 50℃; Relative humidity:&lt;90%; Speed regulation range: 90-1400r/min 50HZ, 90-1700r/min 60HZ Weight: 295g &nbsp; Wiring method: Black wire is the motor main wire, red and white are the capacitor auxiliary wires, and 2 blue wires are the speed control feedback wires, the green wire is the ground wire. &nbsp; Package includes: 1 x&nbsp;Speed Controller Method of use: 1. Turn off the power, connect it according to the wiring diagram and make sure the connection is correct. 2.&nbsp;Fix the controller well and set the speed to the lowest "0", so as to avoid sudden large current and permanent damage when starting the power supply; 3.&nbsp;Then turn on the power and adjust the speed knob to the desired position. Please turn off the power when not needed; 4.&nbsp;The governor is connected to the motor. If the torque or speed is found to be inconsistent with the requirements, please adjust the fine-tuning potentiometer on the side of the product 5.&nbsp;To change the running direction of the motor, simply replace the jumper lines of "CCW" and "CW" on the back of the controller. 6.&nbsp;Select COM and CW short connection, then the motor will rotate clockwise. 7.&nbsp;Select COM and CCW short connection, then the motor do counterclockwise rotation. &nbsp;(when changing direction, do not change the direction until the motor stops running completely.) Package List