Features: 100% brand new and high quality This product is 40A high power Speed Controller, mainly used for controlling the DC motor Speed The built-in cooling fan, make it not easy to fever, ensure high efficient work Digital LED display of 0-100% speed percentage This motor speed controller support DC motor CW and CCW rotation Specifications: Input voltage: DC10-55V Output voltage: linear under load Maximum current: 60A Continuous current: 40A Speed control type: flow control Speed control: potentiometer (linear) Support motor: DC brush motor CW and CCW rotation : support Speed regulation range: 0-100% Connection type: terminal Knob specification: 100K (with switch) Type of connection: barrier terminal Weight: 295g Package included: 1 x Motor Speed Controller Note: 1. The digital display is the motor full speed percentage 0-100, non-motor actual speed 1. The input voltage must differentiate "+" ,"-" 2. The input voltage should be equal to the rated voltage of the motor within 10-55V