Features Versatile Speed Control: Easily adjust motor speed, voltage, and temperature by simply rotating the knob, providing precise control for various applications Durable Insurance Cover: Designed with a protective cover to ensure longevity and reliability, making it a dependable choice for your electrical needs Wide Compatibility: Ideal for use with electric furnaces, water heaters, lamps, small motors, and electric irons, enhancing versatility in various settings User-Friendly Design: Features a straightforward structure for effortless installation and operation, making it suitable for both beginners and professionals Stable Performance Assurance: Engineered for consistent operation, allowing you to use the motor controller with confidence in demanding environments Features: 1、, input connection AC 220V, output connected to electric furnace wire or motor equipment, then rotate the knob for speed, voltage and temperature control. 2、Generally used in electric furnaces, water heaters, lamps, small motors, electric irons, etc. 3、The insurance cover can make sure the durability of the product. 4、This AC voltage regulator has a simple structure and easy . 5、Profional design of AC voltage regulator, stable performance, rest assured to use. Specification: Description: Working voltage: AC 220V Regulation voltage: AC 10-220V Max power: 4000W (resistive load) Efficiency: 90% Dimensions: 85 x 55 x 38MM Note: You must connect to the load before the regulator. SCR is mainly used for resistive loads (incandescent electric wire, etc.), most of the single-phase AC motor can, but can not guarantee, other types of loads buyer to confirm their own. Fuse is not a panacea, there is reaction time, if the current is too large, in addition to burn the fuse, the module may also be burned. Attention to fitting plastic cover due to the installation of the housing, can not be completely open, screwdriver to tighten the side with the point, the other to be careful when opened, excive force easily snapping the lid, expr transportation may also crushed for wearing parts, but It does not affect the module. Package included: 1 x 4000W AC220V SCR silicon controlled electronic volt regulator Package List: 1 x 4000W AC220V SCR silicon controlled electronic volt regulator Package List 1 x 4000W AC220V SCR silicon controlled electronic volt regulator