uniquegoods 1803BKW 1.8v 3v 5v 6v 7.2v 12v 2A 30W DC Motor Speed Controller (PWM) Adjustable Driver Switch Input supply voltage: 1.8V-15VDC; The maximum output power: 30W The maximum continuous output current :2A Duty Cycle adjustable: 5%-100%potentiometer with switch function. Item size: 1.3*1.3*0.6 inches ; Net Weight:0.5 ounces