uniquegoods Mini DC Motor PWM Speed Controller 5V 6V 12V 24VDC 5a DC Motor Speed Control Switch LED Dimmer Module size(no including the swtich):1.19"*0.95",weight:0.53oz Working Voltage:3V-35VDC; The Max. output power:90W PWM frequency: 10kHz; Duty Cycle adjustable: 1%-100% Statical current:0.015A The PWM DC motor controller mainly use for brush motor controls the speed,cannot use for brushless motor or brushless fan.