A new type of bidirectional high-power thyristor is used, as the current can be 25 A, which solves the problem of overcurrent caused by too small electric furnace wire when cooling. The product can easily adjust the output voltage, between 50 and 220 volts, for the use of electrical equipment with different voltage requirements. The thyristor is mainly used for resistive loads (incandescent lamp with electric filament, etc.). Most single-phase AC motors are also available (but not guaranteed). The product is suitable for controlling various electrical appliances, such as electric lights, fans, motors, etc. The maximum load of the product is 2000 W. It should be reduced for a long time. It is suggested that the load should be less than 1000W at room temperature (important parameters, please note). Specification: Voltage: 220V: 2000W (Resistive load maximum) Voltage adjustment: 50-220V AC Short: High-temperature resistant FR-4 circuit board Color: As shown Material: Composite material Size: 48MMx60MMx28MM Package contents: 2 x Regulator Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.