Working voltage: DC 12v - DC 40vContinuous output current : 8A; overload and short circuit protecting current : 10AHigh torque, low heat generating with reverse polarity protection, high current protectionYou can configurate speed with potantiometer and drive a lot of motors as unidirectionally.Boards are prefered for easy usage and high performance.Feature: Working Voltage: DC 12V - DC 40VControl Power: 0.01 - 400WRated Current: 8AMax Current: 10APWM Frequency: 13 khzStatic Current: 0.02 A ( Standby )PWM Duty Cycle: 10% -100%PWM Frequency: 13 khzThe DC Motor Speed Controller allows controlling speed of a DC motor using a Pulse-Width-Modulated (PWM) DC voltage with a Duty Cycle fully adjustable from 10%-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 10A fuse, with reverse connection of power supply and control voltage over-voltage protection function.Package Including: 1 x Speed Controller