Usage Tips:Wide application: The speed regulat can adjust speed, temperature, voltage, lighting. It is widely used in exhaust fans, tungsten filament light bulbs, electric furnaces, angle grinders, marble machines, blowers. Note: It cannot be used in electrical appliances with circuits. Microwave ovens, induction cookers, rice cookers, water pumps, washing machines, LED energy-saving lamps other boards capacitive electronic components High-quality materials: The variable speed controller is made of high-quality plastic insulated flame-retardant shell, which does not discol, defm, crack, is high temperature resistant. The internal parts are made of thickened phosph bronze, which is safe reliable in quality has a longer service life. High-precision display: The fan speed control switch uses a precision voltage adjustment knob to adjust the voltage. It has high precision good stability. The control accuracy can reach 1 volt. Through the digital display, you can accurately underst the wking voltage of the machine. The LED light makes the real-time voltage Numbers are clearer Overload overvoltage protection: The variable speed fan controller is equipped with an indepe ndent switch to control the voltage, with overload sht circuit protection functions. When the instantaneous current exceeds 15 amps, the switch will automatically cut off power to protect the controller. You can also indicate The light determines the wking status of the switch Product name: Electronic voltage stabilizer Input voltage: AC220V-250V Output voltage: AC0-220V (adjustable) Maximum power: 4000W (load power 2000W) Maximum current: 15A (load current 9A) Product size: 120x65x55mm Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy so on Colour:As Shown Material:plasticandmetal Voltage:220V-240V Package Contents: 1 x speed controller Only the above package content, other products are not included. Note: Light reflection different displays may cause the col of the item in the picture a little different from the real thing. The measurement allowed err is 1-3cm.