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(More customer reviews)The product description of this item (Franzus TSM-1875CK International Converter/Adapter Set) is highly misleading. It says: "Converts 220V foreign electricity to 110V for use overseas on most U.S. appliances rated 0-1875 watts". But the fact is, it can only convert 220V to 110V at LOW setting, which works up to merely 25 Watts.
This product is actually two different converters built into one package. At LOW setting, it uses a small AC transformer to convert 220V sinusoidal waveform into a 110V sinusoidal waveform. This is the preferred approach which works well for any low-power electronic appliance.
To handle higher power, the AC transformer must be made bulkier and heavier (around 20 pounds just for 1000W). This makes it impractical as a travel voltage converter for large-wattage appliance. Therefore at HIGH setting (26-1875W), this converter simply uses a solid-state switch inside to chop off part of the input 220V sinusoidal waveform. This is exactly how an incandescent lamp dimmer works. However, its output waveform is highly distorted and is far from an 110V sinusoidal AC voltage.
A purely resistive appliance (such as travel iron or water heater) will work just fine regardless of different voltage waveform. But if you ever try to power an electronic appliance (such as TV, computer or battery charger) with this chopped-up 220V waveform, it will probably be fried in an instant! My advice is to stay away from this potentially destructive product - unless you are really, REALLY careful about what to plug in.
If you have to bring electronic appliances with your oversea trips, make sure they are rated for universal voltage of 100-240V AC. Power supplies for most portable electronics (laptop, camcorder, cell-phone, electric shavers, etc.) are already designed to accept universal voltage, although some of them may require you to physically flip a voltage selection switch - check the user manual or the AC input plug of your appliance to make sure. If that is the case, all you need is a set of plug adapters (such as the Lenmar AC5), which can be purchased for much less.
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Franzus International Converter/Adapter Set is for use overseas with 110 voltage products..
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