can easily adjust the mains output voltage, at 0-100% (220 volts sub-100 level adjustment, non-linear) between the arbitrary adjustment for the use of electrical appliances. Such as: electric furnace, , heating, lighting dimming, small motor speed, electric iron thermostat. The use of new two-way high-power thyristor, because the current up to 40 amps, a good solution to the electric furnace wire in the case of cooling resistance is small to cause over-current problems; In order to achieve dimming, tempering, regulating the effect. Large electric appliances that can be used for electric power less than 2000 Due to the large power, the average home electric appliances or small factories are enough.(This regulator is equipped with two-way high-power thyristor, can be used without any additional components, very convenient and practical). Comes with heat sink, the buyer can get the hand can be used, Weight: 0.34392112872 Pounds, Manufacturer: NONDK