Wide application: The speed regulator adjusts speed, temperature, voltage, and lighting. It is suitable for exhaust fans, tungsten filament light bulbs, electric furnaces, angle grinders, marble machines, and blowers. Note: Not compatible with appliances containing electronic circuits, including microwave ovens, induction cookers, rice cookers, water pumps, washing machines, LED lamps, and devices with capacitive or board-based electronic components. Construction: The variable speed controller features a plastic insulated, flame-retardant housing that resists discoloration, deformation, and cracking under high temperatures. Internal components are made of thickened phosphor bronze for enhanced safety, reliability, and extended service life. High-precision display: Equipped with a precision voltage adjustment knob for accurate voltage control. Offers high accuracy and stable performance, with control resolution up to 1 volt. Digital LED display clearly shows real-time output voltage. Overload and overvoltage protection: Includes an independent power switch with built-in overload and short-circuit protection. Automatically cuts off power when instantaneous current exceeds 15 A to protect the unit. An indicator light shows operational status. Product name: Electronic Voltage Regulator Input voltage: AC 220 V – 250 V Output voltage: AC 0 – 220 V (adjustable) Maximum power rating: 4000 W (recommended load: 2000 W) Maximum current rating: 15 A (recommended load: 9 A) Dimensions: 120 × 65 × 55 mm Plug type: EU plug (compatible with Indonesia, Germany, France, Spain, Italy, etc.) Color: As shown Materials: Plastic and metal Rated voltage: 220 V – 240 V Package contents: 1 × speed controller