Features 1.[FOR DC MOTOR] The DC motor speed control module can accurately adjust the speed of DC 12‑40V motors. 2.[EXCELLENT CIRCUIT] Ultra low voltage DC motor speed controller with high quality circuit board and switch function. 3.[OVERLOAD PROTECTION] With overload protection, the fuse will be automatically disconnected if the current is too large, and will be recovered after cooling. 4.[PWM MODULATION] With 0‑100% stepless variable speed, PWM modulation, has wide application range and strong practicality. 5.[WITH POTENTIOMETER] Rotate the potentiometer to adjust the motor speed, adjustable stop or full speed, easy to operate. Specification Item Type: Motor Controller Module Model: XH-M222 Speed Regulation Principle: PWM modulation Input Voltage: DC 12-40V Maximum Power: 800W Maximum Current: 20A Speed Adjustment Range: 0-100% full speed (stepless variable speed) Package List 1 x Motor Controller Module