Description:It's a PWM speed controller so it enables you to control the speed of these little DC brush motors smoothly. It's perfect for applications like fans, etc. providing nice adjustment of motor speed instead of the more usual "High-Low" switchingFeatures:Wide range of operating voltage: 12V, 24V, 36V, 60VA good speed controller for DC brush motorsHigh-frequency capacitance, power tube and 10A fuse are used in the moduleAdopts sealed and high-quality potentiometer with switch, stable performanceMetal case creates better durability; high efficiency and low noiseSuitable for applications like fans, etc. providing nice adjustment of motor speedSpecifications:Operating Voltage: DC 10-60VRated Current: 8AMax. Current: 10AControl Power: Maximum. 400Wspeed Control Range: 0% -100%PWM Frequency: 21KHzItem Size: 73 * 39 * 31mmPackage Includes:1 * DC Motor speed Controller.