Fine workmanship and secure performance Durable in use For car truck fan heater control Can used for fan, automobile heater fan, Defroster ect Operating voltage: 12/24 V Current: 10 A Arbitrary purple : power 12V or 24V + The different red: motor + Blue: motor - Black: power - Control speed range: 0-100% Material: Plastic + Metal colour: As shown Package Contents: 1 x Motor Speed Controller Switch Only the above package content, other merchandise are usually not incorporated Note: Light shooting and various displays could cause the color of the thing in the photo slightly assorted from the real factor The dimension allowed error is +/- 1-3cm