This DC motor speed controller supports input voltage of 10V-55V and has a max current of 60A. It features a well-designed case for heat dissipation and protecting the controller board. The digit display shows speed rate in percent from 0% to 100%, and the direction of rotation can be set for forward and reverse motor movement. Control frequency is 15KHz with a regulating current method using a linear potentiometer. The compact design provides reliable and efficient performance for your DC motor. Features: - The input voltage can be DC 10V to 55V. - Well design case can protect the controller board from damage as well as dissipate heat. - Designed with a digit display that shows the rate in percent of actual speed to maximum speed. - This motor speed controller would allow setting direction of rotation that accomplishes reversing the motor's direction. Specifications: Max. Current: 60A Continuous Current: 40A Input Voltage: DC10V-55V Speed Range: 0% to 100% Forward & Reverse: Support Control Frequency: 15KHz Rotary Knob: 100K(with switch) Regulation Type: Regulating Current Regulation Method: Potentiometer(linear) Package included: 1 x Speed Controller Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.