Voltage converter for electric appliance that's made for China but needs to be used in the US?

I know the electricity voltage in China is 220V and that in US is 110V. I have a small electric appliance that my friend brought for me from China, what sort of voltage converter do I need? So far I've only found 220V to 110V ones on eBay, will those work?|||Note that 110 is equivalent to 120, and 220 equivalent to 240 VAC,





There are only a few cases where a transformer is needed or will work:





Small appliances, like camera, phone, small electronic items, usually will operate at any voltage or frequency worldwide, all you need is a $2 plug adaptor. Check the documentation.





Large appliances that deliver a lot of heat, like hair dryers would require a heavy large transformer. You can buy a new appliance that has "dual voltage capability", ie, a switch on the handle, for $20, so all you need is a plug adaptor. Much cheaper than a transformer.





Some appliances (anything with a motor) will work only on 60Hz, and not at 50Hz, which is what they have in the rest of the world.





What is left? whatever it is, you can convert the voltage from 220-240 to 110-120 volts, BUT, the transformer must have a big enough power rating to handle whatever you plug into it. That means if you have an 800 watt appliance, you need a 1000 watt transformer. Big and heavy.








.|||Some modern "appliances" will accept any input voltage. Others have links or dual- wound transformer primaries, that can be adjusted to work with either voltage.


Some have nothing. The only alternative then is a transformer between voltages, but that transformer has to have a VA or secondary current output rating equal to or greater than the appliance.|||What kinds of appliance and how many watts,read the label ?


You need a step up transformer 110 v into 220 v and the wattage of transformer must bigger than the appliance.


If this appliance is AC motor type,it shall lost some speed or torque even you match its voltage to 220 volts,because the frequency is different.


USA has 240v in house. It locates on dryer and stove wall outlet.