Features: DC 10-55V MAX 60A CW CCW Reversible Switch PWM Motor Speed Controller Perfect replacement for the old or damaged one Supports large current start LED display 0~100% speed percentage, easy to read Built in heat dissipating fan, great for fast heat dissipation Durable and practical to us Specifications: Input voltage:DC 10V~55V Maximum current:60A Continuous current:40A Speed range:0%~100% Control frequency:15KHZ Speed regulation:Potentiometer (100k/with switch function) Speed Regulation Type Regulating Current Reversible Switch:CW/CCW Digital Positioning:0-100 (percentage of full speed) Support Motor:DC brush Wiring Type:Screw Terminals Warm Tips: 1.The digital display only shows 0-100%, which is the percentage of the full speed of the motor, not ihe actual speed of the motor 2.The input voltage should be equal to the rated voltage of the motor 3.Power supply input must be divided into positive and negative Size:12.5x9x4.6cm/4.92x3.54x1.18inch Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you Package Includes: 1x PWM Motor Speed Controller