Input Voltage : 220V 
Maximum Powe r: 2000W 
Adjustable Voltage : 50-220V AC 
Size : Approx 5.5 x 4.8 x 2.7cm (2-5/32 x 1-7/8 x1-1/16”) 
Feature： 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