Dear customer: Thank you for choosing my store for shopping. The following are the matters needing attention for shopping:A. Economic transportation: detailed tracking information will not be included. Most of the packages will cause delayed delivery within the expected delivery time, so you need to be patientB. Each product link: There will be different option variants. If you do nt know how to select the product you want, please contact me, I will be honored to solve this problem for you.C. When you receive the package, there is product damage / product problem / error product and shipping problem, please contact me in time, I will solve it for you!D. If you are a wholesaler / distributor, a large number of orders and quantities, to provide you with factory prices, and hope to be honored to reach a partner with you!GOOGZON store: I wish you a happy life! A 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. 48 x 54 x 27mmMaterial: Plastic, metalThe motor regulation power can only be within 500WTips: this product can only be adjusted by load, such as the old incandescent lamp or fan B Connect this device with lamp or home appliance in a series connection, then rotate the knob for dimming, speed, voltage, temperature controlApplicable Appliance: Electric furnace, water heater, lamps, small motor, electric iron etcInput Voltage: 220VMaximum Power: 2000WAdjustable Voltage: 50-220V ACMaterial: plastic and metalSize: 4.8 x 3.5 x 2.7cm/1.88*1.37*1.06"