Item Type: Stepper Motor Controller_x000D_ Model: YF-18_x000D_ Input Voltage: DC8~24V_x000D_ Adjustable Speed Range: 0.1~999 rpm_x000D_ Application: Stepper Motor, DC Motor 1High Quality Circuit Board: The speed controller adopts high quality circuit board, professional manufacturing, exquisite workmanship, longer service life and high reliability. 2Real Time Speed Update: This coded potentiometer can adjust the speed accurately, and the speed can be updated in real time. 3Digital Display: A motor controller designed with a digital display, which displays the percentage of actual speed to maximum speed. 4Memorable When Power off: The motor controller has the function of memorizing the last set speed value when power off. 5CW and CCW: The motor controller can be jog CW and CCW, self locking CW and CCW, and the speed range is 0.1?999 rpm.1 x Speed Control Module