Features: Suitable for electric furnace water heater lamps small motor electric iron. etc Connect this device with lamp or home appliance in a series connection you can play a brightness adjustment speed pressure temperature control effect Life span and easy installationvery convenient to use. Material: plastic metal Specification: Input Voltage: 220V Maximum Power: 2000W Adjustable Voltage: 50-220V AC Size: approx. 5.3 x 4.7 x 2.8 cm Net weight:43g Package Included: 1x Voltage Regulator