Description: This is a simple and easy-to-use DC motor speed controller of elegant appearance and stable performance. It is made with circuit board which ensures a longer service life. The input voltage can be DC 10V to 50V. This speed controller with high power allows setting direction of rotation. Features: Speed controller is made with circuit board which ensures a longer service life. This simple and easy-to-use DC motor speed controller has an elegant appearance and stable performance. Well design case can protect the controller board from damage as well as dissipate heat. There are two build-in 80A large current relay in this motor speed controller which ensures a better regulation. This motor speed controller would allow setting direction of rotation that accomplishes reversing the motor's direction. Specifications: Input Voltage: DC10V to 50V Output Voltage: Linear with load Maximum Current: 40A Rated Current: 30A Frequency: 16KHz Speed Range: 0% to Forward and Reverse: Support Regulation Method: Potentiometer with switch Regulation Type: Regulating Current Size: 110 x 90 x 78 x 38mm / 4.33 x 3.54 x 3.07 x 1.50" Fitment: Suitable for DC brushed motors within 12V 250W, 24V 350W, 48V 500W Package Includes: 1 x Speed Controller Note: 1. This product is only used for speed regulation of DC brushed motors; 2. This product cannot be used as a voltage regulator or regulator; 3. This product cannot be powered by 48V batteries or accumulators; Please confirm your needs before ordering.