To voltage regulator series used in the circuit, voltage regulator and lamp, appliances connected in series in the circuit (namely the desk lamp, household appliance and so on break open any live wire and zero line of a root, in the "product" of the terminal can be connected), turn the knob cap can be dimming, the speed and the temperature, the pressure regulating; operation is simple and convenient.Using method:Size: high temperature resistant FR4 circuit board, circuit board size *37mm 60mm high 45mmVoltage regulation: AC 0V-220V continuous adjustableMaximum power: 4000WUse voltage: AC 220VTechnical parameters:Anti surge, anti surge, RC absorption of multiple protection!Circuit characteristics:AC 0V-220V continuous adjustable, zero lag, zero delay, super cooling.Circuit function:This voltage regulator with peak voltage absorption circuit can effectively protect the high power SCR, life is more durable.1.6mm thick epoxy copper clad laminate, large current design, buyers can be used to get the hand.Semiconductor (STMicroelectronics) - controlled silicon, BTA41-800B, with high efficiency!Note that the back part of the module is made of copper, but not enough.With a new type of high power thyristor, the current is up to 40 amps, which is a good solution to the problem of the electric resistance of the electric wire in the cooling case. It is convenient to adjust the output voltage of the city, and the 220V - 0V can be adjusted continuously. Use case: electric furnace and water heater heat, lamp dimming, small motor speed control, thermostat electric iron, imported 110V electrical pressure (220V turn 110V) and so on, so as to achieve the temperature, light, speed, adjusting the pressure effect. Load maximum power: 4000W. Can be used in large, medium and small electrical appliances, because the power has been great, so the general household electrical appliances or small factories enough (inductive load or capacitive load power should be used). Gently rotating knob cap, it can be flexible adjustment, without any additional components, the product is practical and convenient.