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 Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you!