1、The motor speed controller has a maximum working current of 10A, and it can work for a long time in a well-ventilated environment and under normal working conditions. 2、High-performance speed regulator, high power, small heat production, high efficiency and low noise. 3、The controller uses sealed potentiometer, featured with good dustproof capability and stable speed regulation. 4、On-board original imported power tube and stabilovolt tube can withstand high voltage, stable performance and long service life. 5、The potentiometer has ON/OFF function, and you can turn off the power by turning it counterclockwise to the end. Features:  The motor speed controller has a maximum working current of 10A, and it can work for a long time in a well-ventilated environment and under normal working conditions. High-performance speed regulator, high power, small heat production, high efficiency and low noise. The controller uses sealed potentiometer, featured with good dustproof capability and stable speed regulation. On-board original imported power tube and stabilovolt tube can withstand high voltage, stable performance and long service life. The potentiometer has ON/OFF function, and you can turn off the power by turning it counterclockwise to the end. Specification: Model: CCM5NJ Working voltage: DC10-60V Output volltage: 0-100% of input voltage Rated current: 8A Maximum current: 10A Potentiometer: Resistance B100K,  Hole 8mm Speed range: 0-100% PWM frequency: 21KHz Size: 73*39*31mm / 2.87* 1.54* 1.22in   Package list: 1 * DC Motor Speed Controller Note: The positive and negative poles of the power supply cannot be reversed.