Applications: suitable for a nominal current of less than 4A DC fan (can brush brushless with or without speed line can be used) current is less than 2A miniature DC motors pumps lights and so on. Product Features: CCMFC technical parameters: Input voltage: 5V / 12V / 24V. Fan speed governor will have a pressure drop usually around 0.5V (for example: input 12V output the smallest in 0.5V output most about 11.5V; input 24V output the smallest in 0.5V output of approximately 23V) . Red: positive power input connection; Black line: connect the power input negative; Blue Line: pick a fan positive; Gray line: Connect the negative fan. Note: Brushless fan power of positive and negative reverse the will burn.