Working voltage: DC 12v - DC 40v Continuous output current : 8A; overload and short circuit protecting current : 10A High torque, low heat generating with reverse polarity protection, high current protection You 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 40V Control Power: 0.01 - 400W Rated Current: 8A Max Current: 10A PWM Frequency: 13 khz Static Current: 0.02 A ( Standby ) PWM Duty Cycle: 10% -100% PWM Frequency: 13 khz The 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