Customizable Voltage: Offers An Adjustable Range From 10v To 220v, Ensuring Flexible Control Over Voltage, Speed, And Temperature For A Broad Spectrum Of Electronic Devices. Safety-First Design: Features A Dual Capacitance System Comprising Amperometric Capacitance And Metal Film Capacitance, Safeguarding Against Voltage Spikes For Safe Operation. Convenient Control: The Adjustable Rotary Knob Provides A User-Friendly Interface For Easy Management Of Voltage, Speed, And Temperature Settings. Rugged Build: Made With 1.5mm Thick Aluminum And Stainless Steel, This Device Offers Unmatched Durability And A Long Service Life. Broad Compatibility: Suited For Various Electronic Devices Including Electric Furnaces, Water Heaters, Lamps, And Small Motors, Facilitating Customized Performance. Master Your Electronic Devices With The Unfaltering Precision Of Our Motor Ac 220v Adjustable Rotary Knob High Power Scr. This Electronic Volt Regulator Is Designed To Provide Seamless Control Over Voltage, Speed, And Temperature. Its Dual Capacitance Design Ensures Safe Operation By Shielding Against Voltage Surges, While The Adjustable Rotary Knob Offers Ease Of Use. Ideal For A Multitude Of Applications, This Device Is Your Key To Tailoring Performance To Your Exact Needs.