Fine workmanship and stable performance. in use. For car truck fan heater control. Can used for fan, car heater fan, Defroster . Operating voltage: 12/24 V Current: 10 A Arbitrary red : power 12V or 24V + The other 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 products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin