12V-40V 10A DC PWM Motor Speed Controller 1M Cable Coil end 1 and Coil

Coil end 1 and Coil end 2 are used to trigger ON/OFF the relay

Connect your DC motor (or DC load) to the motor terminals as indicated on the wiring diagram

It can receive the audio in any form like MP3

It's a Potentiometer Knob Black and White

2k ohm 2W and tolerance of ±5%

12V-40V 10A DC PWM Motor Speed Controller 1M Cable Coil end 1 and Coil400W DC PWM Motor Speed Controller allows you to regulate the speed of a DC motor with a Pulse Width Modulated (PWM) DC voltage and a Duty Cycle that may be adjusted from 10% to 100%. Your DC motor or other DC load can receive a continuous current of 0 10A at 12V 40V DC from the motor speed controller. Your DC motor or other DC load can receive an 8A continuous current from the motor speed controller. The circuit also incorporates a 10A fuse, as well