Check the listing for details. DC 12V 24V 5A DC Motor Controller PWM Adjustable Speed Digital Display Encoder. Condition: New. Listed at 10.15 USD. Features: 1.Equipped with start-stop button, and can be external switch control, to meet various customer control requirements 2.Motor soft start function. When starting the motor, the current increases slowly and there is no shock current, which can effectively protect the motor and prolong its service life 3.Duty cycle, duty cycle upper and lower limits and working frequency can be set to facilitate customers to operate and use their motors according to their working characteristics. 4.Digital encoder knob adjusts motor speed, which is more accurate and consistent than ordinary potentiometer. 5.With standard 5135 instrument shell, convenient for customer installation. Descriptions: 1.This is a DC motor controller PWM, adjustable speed digital display encoder duty ratio frequency ZK-MG. Specifications: Model: ZK-MG Material: Plastic+Metal Working voltage: DC5V~30V, input anti-reverse connection protection Rated current: 5A maximum current 15A Maximum power: 150W Working frequency: 1KHz~99KHz adjustable, 1KHz step, default frequency of 20KHz, accuracy of about 1% Duty cycle: 0-100%, 1% step Product size: 76x43x26mm/2.96x1.68x1.01in Product weight: 41g/1.44oz Package Included: 1 x DC Motor Controller PWM