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. etcInput Voltage: 220VMaximum Power: 2000WAdjustable Voltage: 50-220V ACSize (L x W x H): Approx. 4.8cm x 5.5cm x 3cmMaterial: Plastic, metalWeight: 42g Packing Included:1 pc x Speed Thermostat Controller