High power: 4000W resistive load limit power, it is recommended to use within 2000W for a long time at room temperatureVoltage regulation: 0- (100-level regulation at 220 volts, non-linear)Using a new type of bidirectional high-power thyristor, because the current can reach 40 amps, it solves the overcurrent problem caused by too small resistance of the electric furnace wire when it is cooled; it can easily adjust the output voltage of the mains. 0- (220 volts, 100-level adjustment, non-linear)Can be adjusted arbitrarily for electrical appliances. Such as: electric furnace, heat adjustment of water heaters, light adjustment of lamps, speed adjustment of small motors, temperature adjustment of electric irons, etc. Thereby, the effect of dimming, temperature regulation and voltage regulation. It can be used by large appliances with a power consumption of less than 2000 watts.Since the power is already very large, it is sufficient for general household appliances or small factories. (This voltage regulator is equipped with bidirectional high-power thyristor, which can be used without adding any components, which is very convenient and practical). Comes with heat sink, buyers can use it when they get it.Use voltage: AC 220VHigh current terminalButton Adjustment Stability Potentiometer Type Voltage RegulatorThe value is automatically saved, and automatically starts to the last adjusted value after power-onUnified anti-static packagingAll metal film resistors are stable and durableVoltage regulator with voltage absorption circuit to effectively protect high-power thyristor, longer life and more durableColour: as shownMaterial: PCBSize: 10x5x3cmPackage Contents:1 * Voltage regulatorOnly 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 measurement allowed error is +/- 1-3cm.