Specification:Working voltage: DC 9 -60V Output voltage: Linear under load Maximum current: 20A Continuous current: 18A Speed control range: 0% -100% Control frequency: 25KHZ Speed control mode: Use potentiometer regulating current Size: 92 * 52 * 36MM Package Included:1 * DC 9-60V PWM DC Motor Speed Controller Stepless 12V 24V 60V MAX 20A Pulse Width Modulator Motor Speed Regulating Switch