Fine workmanship and safe performance. Durable in use. For automobile truck fan heater control. Can used for fan, vehicle heater fan, Defroster . Operating voltage: 12/24 V Current: 10 A Arbitrary pink : calories 12V or 24V + The other red: motor + Blue: motor - Black: energy - Control speed range: 0-100% Material: Plastic + Metal colour: As shown Package Contents: 1 x Motor Speed Controller Switch Only the above equipment content, different products aren't included. Note: Light and varied displays could cause the colour of the thing within the photograph a bit varied from the genuine thing. The length allowed error is +/- 1-3cm.