Power supply: Power supply voltage of the PWM Pulse Signal Generator is 15-160VDC or 5-12VDC. If a 5-12 VDC power supply is used, the positive terminal is connected to the DC 5-12V input and the negative terminal is connected to the common cathode terminal. Press the button to control the forward and reverse of the motor. The speed of the motor can be controlled by adjusting the frequency of the potentiometer. PWM signal functions: PWM DC Motor Controller can generate a PWM signal functions, the board has a jumper, you can set the default selection provided in the pulse frequency signal. The controller has high, medium and low total of three types of frequency signals can be used to select jumper. High-quality materials: Speed Regulator Board is made of high-quality materials, anti-rust, wear-resistant, corrosion-resistant, low-temperature resistant, with a certain hardness, wear resistance, a certain impact resistance, durable. Stable, not shaking, collision is not easy to damage. Good materials can increase product life. PWM generator: PUL + and PUL- pulsed positive and negative; EN + and EN- is to enable the positive and negative terminals; DIR + and DIR- are the positive and negative directions. These six lines are connected to drive the corresponding pulse, direction, so six ports possible. Pulse generator: High quality pulse generator, this module is provided as a stepper drive signal. The speed of the motor can be controlled by adjusting the frequency of the potentiometer., Manufacturer: Regun