Features This controller uses novel bi directional high power SCR It can be very convenient adjust the current up to 25A and solve the over current problem of the heating wire The output voltage is adjusted anywhere between 0V 220V for use with electrical appliances It can use to such as electric stove water heater tune thermal lighting dimmer small motor speed electric iron thermostat and achieve dimming thermostats pressure regulator effect Specifications Input voltage AC 220VVoltage regulation AC 0 220VMaximum power 4000 WCurrent 25AResistance materials MetalPackage includes 1 x High power 4000W Voltage Regulator