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 Attention Load does not exceed the maximum power otherwise it will burn module and electrical appliances use the resistive load as far as possible reduce inductive and capacitive load power greatly it is best to leave more than half of them Specifications Working Voltage AC 220VMaximum Power 4000W connected resistive load Voltage Regulation AC 0 220V Start from AC 10VDimensions 89 L x 59 W x38 H MM 3 35×2 56×1 5 Protection Anti spike Surge RC absorption EOC Using Method Step 1 Adjustable Power Supply Board Step 2 connect this device with lamp or home appliance or electric circuit Step 3 then rotate the knob for dimming speed voltage temperature control Package includes 1 x High power 4000W Voltage Regulator