Connect this device with lamp or home appliance in a series connection, then rotate the knob for dimming, speed, voltage, temperature control.
      Applicable appliance: electric furnace, water heater, lamps, small motor, electric iron etc.
      Input voltage: 220V.
      Maximum power: 2000W.
      Adjustable voltage: 50-220V AC.
      Material: plastic, metal.
      Size: 4.8cm x 5.5cm x 2.7cm.