4000W AC Voltage Regulator 220V Dimmer Electric Motor Speed Temperature Controller Smooth and Precise Voltage Adjustment This powerful 4000W AC voltage regulator offers a truly smooth and adjustable voltage range from 10V to 220V. Perfect for appliances that require low voltage to drive heating wires, it provides precise control for a wide variety of applications. Dual Capacitance Design for Enhanced Safety Featuring an advanced dual capacitance system—amperometric capacitance combined with metal film capacitance—this controller efficiently absorbs surges and voltage spikes. Enjoy safer and more reliable performance for your valuable devices. Versatile Applications Designed for flexibility, this voltage regulator can adjust speed, brightness, voltage, and temperature for numerous electronic devices. It is ideal for use with electric furnaces, water heaters, lamps, small motors, and more, making it a must-have tool for both home and industrial settings. Durable and Reliable Construction Built with a high-quality shell case made from 1.5mm thick aluminum and stainless steel, this controller is both safe and durable. The robust construction ensures long-lasting performance and protection for your equipment. User-Friendly Operation Easily control voltage, speed, temperature, and other settings with the convenient adjustable rotary knob. The intuitive design makes it simple to achieve the perfect settings for your specific needs. Upgrade your control over electronic devices with this 4000W AC voltage regulator—combining power, safety, and versatility for all your voltage adjustment needs.