Fine workmanship and secure performance. Durable in use. For car truck fan heater control. Can used for fan, vehicle heater fan, Defroster . Operating voltage: 12/24 V Current: 10 A Arbitrary pink : energy 12V or 24V + The different red: motor + Blue: motor - Black: energy - Control pace range: 0-100% Material: Plastic + Metal colour: As shown Package Contents: 1 x Motor Speed Controller Switch Only the above equipment content, other merchandise usually are not included. Note: Light and different exhibits can cause the color of the article within the photo somewhat varied from the genuine thing. The size allowed error is +/- 1-3cm.