POWERFUL AND STABLE: Adopt pulse width technology to make the speed more stable, and the force is stronger at low speed 2. VARIOUS PROTECTION DEVICE: With short circuit, over current, over temperature protection cut off device, making the performance more reliable 3. ELIMINATE EXCESSIVE STARTING CURRENT: DC motor governor come with soft start device to eliminate excessive motor starting current, more stable and reliable 4. COMPLETELY ISOLATED FOR SAFETY: High and low voltage are completely isolated, making the motor speed controller safer to use 5. CORROSION RESISTANT ALUMINUM ALLOY: Made of good quality aluminum material, light weight, possess good strength and good corrosion resistance. Item Type: DC Motor Governor Material: Aluminum alloy. 0.9 times the input voltage. 1 x DC Motor Governor. The default PWM level is 5V, the frequency is above 1KHZ, and the load capacity is above 0.5MA. The 5V level does not need a series resistor to be input in the PWM port, the 10V level PWM is input from the 0-10V port or the series 10K resistor is input in the PWM port, the 12V level series 3.9K resistor is input from the 0-10V port or the series 13.7K resistor input in PWM port, the 24V level string 16.8K resistor input from 0-10V port or string 27K resistor input in PWM port. The product is a DC motor speed controller, which can only be used for DC motor speed control, non switching power supply, and cannot be used for power supply of other equipment. 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.