- Universal DC motor speed controller for DC 12-40 V, up to 10 A via PWM. It can provide a continuous current of up to 10 A to your DC motor or other DC loads, enabling easy and reliable speed adjustment. - Specs at a glance: Dimensions 60 x 55 x 30 mm; Voltage 12-40 V; Maximum current 10 A; Potentiometer resistance B100K. Pack includes 2 x DC motor speed controllers. - Design and performance: High-efficiency operation delivers good torque with minimal heating. The controller has been upgraded multiple times and is widely used in industrial production. - How to use: Adjust the speed output duty cycle by turning the potentiometer knob. Wiring for speed control should be done with care; ensure wires do not touch the heat sink. Turning the potentiometer clockwise increases its value, changing the speed output. - Practical applications: Ideal for robotics and hobby projects requiring variable motor speed; adjustable speed control for DC fans or pumps; suitable for small automation or conveyor-style devices needing precise speed tuning.