Features Equipped with a numeric display that shows the rate in percent of the actual speed at the maximum speed. The speed controller is made of a high-quality circuit board, which ensures a longer service life. This simple and user-friendly DC motor speed controller has an elegant appearance and stable performance. A well-designed housing can protect the control board from damage and dissipate heat. This motor speed controller would allow rotation direction adjustment that causes the motor to reverse direction. Description: This is a simple and user-friendly speed controller for DC motors of elegant appearance and stable performance. It is made with high-quality circuit board, which ensures a longer service life. The input voltage can be DC 10V to 55V. This high power speed controller allows you to adjust the direction of rotation. Specifications: Input voltage: DC10V-55V. Output voltage: linear with load Max. Current: 60 A. Continuous current: 40 A. Speed range: 0% to 100%. Forward backward: support Control method: potentiometer (linear) Regulation Type: Regulating Current Control frequency: 15 kHz. Wiring Type:Screw Terminal Rotary knob: 100K (with switch). Suitable for: Brushed DC Motor Size: 100 x 76 x 28 mm/3.93 x 2.99 x 1.1 inches. Package includes: 1 x speed controller Package List