Its 20 amps High power Motor Speed controller Board. This motor controller board can regulate the motor speed and led light brightness both. Its 20Amps capacity powerful controller and you can connect lots of item to it. Operating voltage is 12-40volt and load capacity is 800watts max.
Use this for high load applications like cutting, grass cutter, grinding, drilling, Fan etc. where you use more than 2 motors.
 
Max 800 watts PWM Speed Controller.
With reverse polarity protection, high current protection, LED Indication.
Working Voltage: DC 12V - DC 40V.
Static Current:0.02 A 
Max load current - 20amps
 
Package included:

1 x PWM DC Motor Speed Controller