Features: Mini size, portable and lightweight, strong power, easy to use, and long service life. The parameters are simple and easy to debug, with small vibration and low noise. The special groove die cast rotor is used, with large starting torque and small inertia. Adopts ABS flame-retardant housing, wear resistance,wiring protection, sealing structure, dustproof, waterproof and oilproof. Anti-slip rotation knob design for easy adjust the working speed. Wiring protection, sealing structure, dustproof, waterproof and oilproof. One button to on/off the motor, and please disconnect the powersupply when it is necessary to stop the operation for a long time. Corotation and reverse adjustable, easy to adjust according to your demands. The governor starts slowly and has a soft-start function. This motor speed controller is suitable for AC220V 50/60HZ motor. The controller uses high quality electronic circuit and integrated components for durability. Speed regulation range is 90-1400r/min 50HZ, 90-1700r/min 60HZ. 400W high power can provides stable performance. Widely used in packaging, printing, food, electronics, instrumentation, medical equipment, garment industry production line to do speed control drive. Specifications: Power supply: AC220V 50/60hz Output current3A Maximumspeed: 1400r/min Relative humidity: