4000W AC 220V High Power Dimming Speed Temp Regulation Control Electronic Volt Regulator for Adjusting Dimming Speed Temperature. Features include efficient speed control, high-temperature resilience, exquisite craftsmanship, and stable performance. The thyristor governor is equipped with a high-temperature resistant FR-4 circuit board and is compatible with AC brushed motors. Specifications include origin from Mainland China, 220V AC voltage, 4000W maximum power, and aluminum alloy material. The regulator has a size of 86.00x76.00x37.00mm and includes an adjustment knob and connection pads. It also has a security function that protects against electrical overload or short circuit.