Motor Speed Controller, DROK Motor Control Board AC 110V 4000W Adjustable Voltage Regulator SCR High Power Dimmer Controller Temperature Governor Dimming Monitor DROK motor controller operating voltage range is AC 110V to 220V, max power is 4000W, long term operating power is 3000W. High Quality: the high power motor control module adopts double insulation, meaning there will be no electric leakage if short-circuit or SCR burn out. Protection: our motor regulator is designed with Anti-spike and anti-surge protection, RC absorption, fuse all enhance usage safety. Aluminum Case: the motor speed controller is equipped with Aluminum case prevents it from easy damagement; filled tin stops it from heating when in huge current. Application: the motor governor can be applied to electric stove, water heater heat regulation, dimming lamp, small motor speed control, electric iron thermostat, etc.