1High quality AC motor speed controller, stable performance. 2Professional manufacturing, exquisite workmanship, high reliability. 3Compact structure, durable and easy to use. 4Easy to operate and maintain, superior performance. 5Suitable for packaging industry, machine tool industry, transport equipment, textile machinery, automatic welding machine, automobile industry, elevator machinery, etc. Features: High quality AC motor speed controller, stable performance. Professional manufacturing, exquisite workmanship, high reliability. Compact structure, durable and easy to use. Easy to operate and maintain, superior performance. Suitable for packaging industry, machine tool industry, transport equipment, textile machinery, automatic welding machine, automobile industry, elevator machinery, etc. Specification: Condition: 100 percent brand new Interface form: 4.8 or EL or 5559 (Optional) Operating power supply: AC220V 50 or 60Hz, voltage fluctuation range plus or minus 10 percent Ue Rated power: 400W Using the environment: -10 to and50 Relative humidity: less than 90 percent Speed range: 90-1400r or min 50HZ, 90-1700r or min 60Hz Instructions: 1, turn off the power, according to the wiring diagram to connect and confirm the correct connection, do not modify arbitrarily 2. Adjust the external speed knob to