uniquegoods DC Motor Speed Controller PWM 6V 12V 24V 3A Variable Speed Regulator Switch Adjustable Driver CCMminiS Package:1 x DC Motor Speed Regulator; 1 x black switch buttom (a gift free) Input supply voltage: 6V-24VDC(max); Item size:2.6*1.26*0.95 inches ; Net weight: 1.4 ounces Duty Cycle adjustable: 5%-100%;PWM frequency: 21kHz; The maximum continuous output current :3A; (the power is 12V * 3A = 36W ... 24V maximum power of 72W)