A new type of bi-directional high-power thyristor is used, capable of handling current 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 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 power is 2000 W; however, continuous use at full load is not recommended. It is advised to keep resistive loads under 1000 W at room temperature. Specifications: Voltage: 220 V Power: 2000 W (maximum resistive load) Voltage adjustment range: 50220 V AC Board: High-temperature resistant FR-4 circuit board Color: As shown Material: Composite material Dimensions: 48 mm x 60 mm x 28 mm Package includes: 2 x Controller Note: The package includes only the items listed above; other items are not included. Lighting and display differences may cause slight color variations between the product image and actual item. Measurement may vary by 13 cm.