["Features:\nMade of high quality electronic components, it is solid, durable and good performance, long service life.\nThis controller controls the speed of a DC motor by using a Pulse Width Modulated (PWM) DC voltage with a duty cycle.\nIt can provide a continuous current of 8A to your DC motor or other DC load.\nAdopting a 10A fuse, it also has reverse connection of power supply and over voltage protections, safe to use.\nThe duty cycle can be adjusted from 10%-, wide range.\nExternal rotary switches for easily adjustment.\nHigh efficiency and low noise.\nMotor speed controller only, other accessories demo in the picture is not included!\n\nSpecification:\nMaterial: Electronic Components\nInput Voltage: DC12-40V\nControl Power: 0.01-400W\nCurrent: Rated current: 8A, Max. 10A; Static current: 0.02A (Standby mode)\nPWM Frequency: 13KHz\nPWM Pulse Width Regulation Range: 10-\nSize: app.6 x 5.5 x 2.8cm/2.36 x 2.17 x 1.1in\nColor: Green\nQuantity: 1 Pc\n\nCautions and Instructions:\nThe input of the DC motor regulator should be DC voltage. Do not directly connect the AC voltage, otherwise it will be burn out.\nThe positive and negative terminals of the DC power supply should not be connected reversely, otherwise the regulator will be damaged.\nThe motor is neither positive nor negative.. When the running direction is not consistent with the expectation, the direction can be changed by adjusting the wire sequence.\nThe knob can change the regulator's output duty cycle, thereby changing the motor speed.\n\nNote:\nNo retail package.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1 x PWM DC Motor Speed Controller"]