A new type of bi-directional high-thyristor is used, capable of handling currents up to 25 A, which helps prevent over-current issues caused by low resistance in furnace wires during cooling. The product allows adjustable output voltage between 50 and 220 volts, suitable for electrical equipment with varying voltage requirements. The thyristor is primarily designed for resistive loads such as electric filament incandescent lamps. Most single-phase AC motors can also be used, though compatibility is not guaranteed. This product is suitable for controlling various electrical devices including lamps, fans, and motors. Maximum resistive load capacity is 2000 W; however, prolonged use at maximum load is not recommended. It is advised to keep the resistive load under 1000 W at room temperature (key parameter, please note). Specifications: Voltage: 220 V Power: 2000 W (maximum resistive load) Voltage adjustment: 50–220 V AC Board: High-temperature resistant FR-4 circuit board Color: As shown Material: Composite material Size: 48 mm x 60 mm x 28 mm Package Contents: 2 x Controller Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error is permitted within +/- 1–3 cm.