uniquegoods 6V 12V 24V 28V DC Digital Display DC Motor Speed Controller PWM Stepless Adjustable Variable Speed Control Switch 1803D Governor 1803D DC motor governor: Input DC 6V-28V voltage range is available, applicable current less than 2A. Duty Cycle adjustable: Potentiometer with switch function, speed range 0%-100%. Display: 0-99 speed ratio digital display, 2-digit LED display is "00"-"99", accurate speed regulation. 2A self-recovery fuse: Operating current is greater than 2A, fuse is automatically disconnected. Wiring: Red line connected to power supply +. Black line connected to power supply -. Yellow line and White line are connected to motor.