Feature:_x000D_ _x000D_ Pulse width modulation(PWM) is used to make the speed more stable, and the strength is high at low speed. _x000D_ The product is made of high-quality electronic components with stable and reliable performance. _x000D_ The product is compact and easy to install in narrow space. _x000D_ The input voltage of the product is within the range of DC 12-60V and the applicable current is within 20A. _x000D_ This is a DC brush motor controller. Please don't use it on AC motors. _x000D_ _x000D_ Specification:_x000D_ Input voltage: DC12-60V_x000D_ Output voltage: linear under load_x000D_ Maximum current: 20A_x000D_ Continuous current: 12A_x000D_ Speed range: 0%--100%_x000D_ Control frequency: 15Khz_x000D_ Speed control mode: potentiometer_x000D_ Speed control type: current adjustment_x000D_ Forward rotation reverse: not supported_x000D_ Digital positioning: 0-100 full speed percentage_x000D_ Support motor: DC brush_x000D_ Wiring type: screw terminal_x000D_ Potentiometer line length: 20cm_x000D_ Digital display line length: 20cm_x000D_ Product size: 70*50*24mm (L*W*H)_x000D_ Installation size: 44mm*2 holes (mounting holes straight through 3mm)_x000D_ _x000D_ Package list:_x000D_ 1 * Motor Speed Controller_x000D_ _x000D_ Note:_x000D_ 1. The digital display only shows 0 to 100, the number is the motor full speed percentage, non-motor actual speed._x000D_ 2. The input voltage should be equal to the rated voltage of the motor. It is not possible to input 220V household electricity._x000D_ 3. Input must distinguish between positive and negative polarity.