DC 6-30V 12V 24V MAX 8A MOTOR PWM SPEED CONTROLLER WITH DIGITAL DISPLAY & SWITCH Input supply voltage: 6V-30V DC Output current: Rated current 5A (8A MAX, can not be prolonged) PWM frequency: 16kHz Duty Cycle adjustable: 0%-100% The digital display the duty ratio Item Include: 1 * 6- 30V DC Motor Speed Controller