Fuction: The new bidirectional high-power thyristor is used, because the current can reach 40 amps, which solves the over-current problem caused by the resistance of the electric furnace wire being small under cooling. 0-100% (220 volts, 100-level adjustment, non-linear) can be adjusted arbitrarily for electrical appliances. Such as: electric furnace, water heater, dimming of lamps, small motor speed, electric iron temperature. So as to achieve the effects of dimming, temperature and pressure. Available for large appliances with an electric power of less than 2000 . Because the power is already large, ordinary household appliances or small factories are sufficient. (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 a heat sink., Weight: 1.9621141318 pounds, Manufacturer: Wesafrae