Controller Structure: This motor speed controller is primarily applicable to 50Hz/60Hz AC circuits. It consists of single phase capacitor starting device, asynchronous motor, and speed sensor for the micro gear reducer 2. Product Features: This motor controller features compact structure, wide speed control range, stable mechanical performance, high working accuracy, and low power consumption. The speed regulation range is 90-1400r/min at 50Hz and 90-1700r/min at 60Hz 3. PWM Technology: This controller employs Pulse Width Modulation (PWM) to achieve dimming and speed regulation functions, offering advantages such as full utilization of power supply energy and power, and high circuit efficiency 4. Working Principle: By changing the duty cycle of the output square wave, the average current power at the load end can be varied within the range of 0-100 %, thereby adjusting the load brightness or motor speed 5. Applications: Can realize constant speed feedback and stepless speed regulation functions for single phase motor, and is suitable for packaging machinery, printing machinery, instrumentation, garment machinery, food machinery, textile machinery, etc. Item Type: Motor Speed Controller Product Material: ABS Voltage Fluctuation Range: ±10%Ue Rated Power: 400W Using Temperature: -10-50? Relative Humidity. The action switch only controls the start or stop of the motor, do not use it intermittently. Please turn off the power when it is idle for a long time. When the torsion or speed does not meet the requirements when the speed controller is paired with the motor, only adjust the fine tuning potentiometer on the side. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.