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 90-1400r or min 50HZ or 90-1700r or min 60HZ(according to your selection).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 ControllerMotor type: alternating current motorRated power: 400WApplication: motor speed regulatorPower supplied: AC110V or AC220V optional, 50 or 60HzEnvironment temperature: -10 to 50Speed regulation-range: 90-1400r or min 50HZ, 90-1700r or min 60HZ (according to your selection)Item size: 113 x 100 x 60mm or 4.45 x 3.94 x 2.36inItem weight: 252g or 8.89ouncePackage size: 120 x 105 x 83mm or 4.72 x 4.13 x 3.27inPackage weight: 284g or 10.02ouncePacking List:1 x Speed ControllerAbout Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shoppingThanks for your cooperation and we'll make you feel satisfied. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.