Multi-functionThe Voltage Converter Transformer can be used with any kind of appliance or device up to 3400 watts.( Some appliances, such as heating appliances, power tools, motors, laser printers and coffee maker, require 2-4 times more watts at start up than the printed rated wattage. We recommend 3X efficiency factor for high wattage heat producing items such as Air Condition, coffee maker,Welding Equipment etc. ) Voltage transformer (220V to 110V, 110V to 220V)We provide you a safe, dependable, stable, cost-effective & easy solution to converting voltages from 110 volts up to 220 volts or from 220 volts down to 110 volts.NOTEThe transformer is equipped with an US power cord, if used in other 220V-240V country you MUST need a plug adapter or local power cord. AC outputs 3 US Standard Socket for 110-120V appliance(s) & 3 Universal Sockets accept all types of plugs except the Big South African plug for 220-240V appliance(s).The transformer can be used in countries which