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 signals 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 signal level is 5V, the signal 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.