Features Stable Speed Control: Utilizes pulse width technology for stable speed control, providing stronger force at low speeds, enhancing performance. Multiple defend Features: Equipped with short circuit, over current, and over temperature defend cut off device for reliable performance and safety. Soft Start Function: Incorporates a soft start device to eliminate excessive motor starting current, ensuring stability and reliability. Complete Voltage Isolation: High and low voltage signs are completely isolated, enhancing the safety of the motor speed controller. stable Construction: Constructed with corrosion-resistant aluminum alloy, offering a lightweight design with excellent strength and corrosion resistance. Specification: Item Type: DC Motor Governor Material: Aluminum alloy ModelDC 0~220 V Package List: 1 x DC Motor Governor 1 x Knob Note: betweendiv>1. The default PWM sign level is 5V, the sign frequency is above 1KHZ, and the load capacity is above 0.5MA.between/div>betweendiv>2. 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.between/div>betweendiv>3. 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.between/div> Package List 1 x DC Motor Governor 1 x Knob