Robust Construction: Encased in a flame-retardant metal housing that resists high temperatures and deformation, this voltage regulator is painted to prevent rust, ensuring durability and safety. Enhanced Functionality: Features a multifunctional industrial socket with thickened copper parts and phosphor bronze accessories for superior safety and conductivity. Offers smooth, limitless speed adjustments without gear restrictions. Convenient Installation: Designed with mounting holes for easy placement and versatile installation, either laid flat or hung. Versatile Applications: Ideal for a wide range of uses including household and industrial appliances, scientific equipment, and educational settings. Supports input voltages of AC220V/AC110V with an adjustable output up to 220V. It can handle a limit power of 4000W for resistive loads and features a peak voltage absorption circuit to protect against surges. Usage Notes: Ensure a load above 20W is connected to accurately measure output voltage. This AC output device must be grounded for safe operation. Not recommended for electronic circuit board products. Voltage: AC110V Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Colour:As Shown Material:PCB+Aluminum Package Contents: 1 x adjustable voltage regulator