Feature:1. Better Control: By adjusting the pulse width modulation, that is PWM, the regulator can easily control the motor speed.2. Simple Working: The PWM frequency is 21kHz, and the duty cycle can be adjusted from 0% to 100%, reliable and convenient.3. Reliable Using: Also comes with switch potentiometer to control the CW rotation, CCW rotation and stop of the DC motor.4. Easier Viewing: 3 digit LED display screen enables a clear viewing on the output, making the operation much simpler.5. Easy to Install: Designed to have a light weight as well as 57 x 37 x 21mm compact size, the installation is very easy.Specification:Item Type: Motor Speed ControllerInput Power Voltage: 6V - 24V DCPWM Frequency: 21kHzAdjustable Duty Cycle: 0%-100%Rated Current: 30APotentiometer: With switch function. Digital Display: The display range of 3 digit LED display is 000-100. For example, 055 is displayed to indicate that the PWM output duty cycle is 55%.Product Size: Approx. 57 x 37 x 21mm / 2.24 x 1.46 x 0.83in.Package List:1 x Motor Speed Controller