Features: This motor speed controller can be installed to reverse the direction of the motor. Designed with a digital display that shows the speed in percentage of the actual speed up to the maximum speed. A well-designed case can protect the controller board from damage and also dissipate heat. The input voltage can range from 10V to 55V. This high-power speed controller allows you to set the direction of rotation. Elegant appearance and stable performance. High-quality PCB can ensure a longer service life. Specifications:Input voltage: DC 10V-55VMax. Current: 60A Output Voltage: Linear with Load Continuous Current: 40A Speed Range: 0% to 100% Control Frequency: 15KHz Adjustment Method: Potentiometer (Linear) Adjustment Type: Regulating Current Forward and Reverse: Support Suitable for: Brushed DC Motor Wiring Type: Screw Terminal Dimensions: 11.1x7.8x 5cm/4.37x3.07x1.97" (Approx.) Quantity: 1 PcNote: Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you make a bid, due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!No Retail Package Package Included:1 x Motor Speed Controller