Royfee 1PCS 150W 10V 12V 24V 36V PWM DC controller DC motor speed regulator Switch 100% brand new and high quality The DC Motor Speed Controller allows controlling direction of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 0%-100%. The motor speed controller can provide a continuous current of 8A to your DC motor or other DC load. The circuit also includes a 8A fuse, with reverse connection of power supply and control voltage over-voltage protection function. The controller is NOT reverse-polarity protected and will be damaged if connect the supply voltage with wrong polarity. Input supply voltage: DC 10V-40V