This motor speed controller uses fine quality electronic circuit and integrated component for fine durability. Small size, high accuracy, stepless speed regulation, and long service life. It is easy to use, and can be used in conjunction with domestically produced single-phase asynchronous motors to achieve feedback constant speed and stepless speed regulation. You can have a try. Features: The controller uses fine quality electronic circuit and integrated component for durability. It has small size, high accuracy, wide speed controlling range, and long service life. It is easy to use, and can be used in conjunction with domestically produced single-phase asynchronous motors to achieve feedback constant speed and stepless speed regulation. Speed regulation-range is 90-1700r or min 60HZ. 400W high power can provides stable performance. Anti-slip rotation knob design for easy adjust the working speed. One button to on or off the motor, and please disconnect the powersupply when it is necessary to stop the operation for a long time. Suitable for packaging, printing, food, electronics, instrumentation, equipment, clothing industry production line for speed control drive devices. Specifications: Name: Speed Controller Motor type: alternating current motor Rated power: 400W Application: motor speed regulator Power supplied: 220VAC, 50 or 60Hz Environment temperature: -10 to 50 Speed regulation-range: 90-1700r or min 60HZ Item size: 113 x 100 x 60mm or 4.45 x 3.94 x 2.36in Item weight: 252g or 8.89ounce Package size: 120 x 105 x 83mm or 4.72 x 4.13 x 3.27in Package weight: 284g or 10.02ounce Packing List: 1 x Speed Controller