Feature:1. Wide Application: The speed controller can regulate speed, temperature, voltage and light, widely used in exhaust fans, filament bulbs, electric furnaces, angle grinders, marble machines, blowers, Note: It canu0027t be used in electrical appliances with circuit boards and capacitance electronic components, such as microwave ovens, induction cookers, rice cookers, water pump, washing machines, LED energy-saving lights etc.2. High Quality Material: The variable speed controller uses high-quality ABS plastic insulated flame-retardant shell, which is not discolored, deformed, cracked, high temperature resistant, The internal fittings are made of thickened phosphor bronze, which is safe and reliable in quality and has a longer service life.3. High Precision Display: The fan speed control switch adopts precision pressure regulating knob for voltage regulation, with high accuracy and good stability, Control accuracy can reach 1 volt, Through the digital display screen, you can accurately understand the working voltage of the machine, LED light makes the real-time voltage number clearer.4. Overload and Overvoltage Protection: The variable speed fan controller is equipped with an independent switch to control voltage, with overload and short circuit protection function, When the instantaneous current exceeds 15 amperes, the switch will automatically power off, thus protecting the controller, You can also judge the working status of the switch through the indicator light.5. Back Hook Design: In order to facilitate the operation of the angle grinder, we specially designed a hook on the back of the governor, through which you can hang the governor on the tool bag of the tool kit, which is convenient to carry and more convenient to use, plug and play, simple and practical.Specification:Item Type: Electronic Voltage GovernorMaterial: ABSColor: Black.Package List:1 x Electronic Voltage Governor