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 Measurement allowed error: +/- 1-3 cm Compatibility and accessories Can be used for fan, car heater fan, defroster, etc. Package Contents: 6 x Motor Speed Controller Switch