uniquegoods 6V 12V 24V 28V 3A 80W DC Motor Speed Controller PWM Adjustable Variable Speed Switch DC Motor Driver 1203BK Silver Switch Input supply voltage: 6V-28VDC Item size: 1.3*2*0.4 inches; Net Weight:085 ounces Duty Cycle adjustable: 5%-100%potentiometer with switch function. The maximum output power: 80W The maximum continuous output current :3A