Features EASY WORKING The PWM frequency is 21KHz and the duty cycle can be adjusted from 0% to 100% reliably and conveniently. Reliable Use Also comes with switching potentiometer to control clockwise rotation, counterclockwise rotation and stop of DC motor. Better control: By adjusting the pulse width modulation, i.e. PWM, the controller can easily control the motor speed. EASY TO INSTALL Designed to have a light weight as well as a compact size of 57 x 37 x 21mm, installation is very simple. Easier Display The 3 digit LED display screen allows clear display of the output and makes operation much easier. Specification: Element Type: Motor Speed Controller Input voltage: 6 V – 24 V DC. PWM Frequency: 21KHz Adjustable working cycle: 0%-100% Rated current: 30 A. Potentiometer: With switching function. Digital display: the display range of the 3-digit LED display is 000-100. For example, 055 is displayed to indicate that the duty cycle of the PWM output is 55%. Product size: approx. 57 x 37 x 21 mm / 2.24 x 1.46 x 0.83 inches. Package list: 1 x motor speed controller Package List 1 x Motor Speed Controller