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This is a high-quality, compact AC 220V 4000W Variable Voltage Controller, designed for efficient regulation of speed, temperature, voltage, and light. Its advanced SCR voltage regulation technology offers seamless adjustments, making it perfect for a variety of applications. Built with a high-temperature resistant FR-4 circuit board and premium imported components, this durable regulator delivers reliable performance.
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When measuring the output voltage when it is empty, it is a virtual voltage. It must be connected to a load of 20W or more to measure the correct output voltage. Input AC power, the output is also AC, not DC. The mentioned 4000W refers to the ultimate power when working under resistive load. The inductive load is 1/3 of the resistive load. This product has a metal case and must be safely grounded.

