General description Fine workmanship and stable performance. This motor speed regulator switch controller is designed for controlling the speed of various devices such as car truck blower heaters, fans, and defrosters. Technical specifications Working voltage: 12V/24V Current: 10A Control speed range: 0-100% Material: Plastic + Metal Package contents 10 x Motor Speed Controller Switch Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing. The measurement allowed error is +/- 1-3 cm.