Seven Star Power Converter AC220-240V to AC110-120V and AC110-120V to AC220-240V

• 100 Watt Step Up/Down Travel Voltage Converter
• Universal Output Socket - Accepts 2 or 3 prong plugs from around the world
• LED indicator light
• Includes Plug for Europe
• Input Selection Switch (110V or 220V)

Step Up/Down transformers are tricky devices. It's not hard to see why so many users gave negative reviews.

But in order to use a converter without any problems, you need to be mindful of 2 things:

1) The required current (in terms of ampere rating) of the device that you are powering.

2) Whether the device is motorized.

If you are using a transformer/converter such as this one for a battery charger or cell phone charger, then you shouldn't run into any overheating or shutdown issues. But if you are using it for a hairdryer or another device with heavy moving parts (like an old tape recorder that uses 3 motors), then you need to pay special attention to #1 and ensure that the wattage rating of the transformer/converter is actually 20 to 30 watts greater than the motorized device's rated power consumption.

These are the precautions I took and it worked perfectly for me.

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A very useful and practical gadget for those who travel a lot. However it is quite heavy. Its own weight causes it to fall out from a socket.

Read Best Reviews of Seven Star Power Converter AC220-240V to AC110-120V and AC110-120V to AC220-240V Here

This is a very useful product if you ever want to use a US electrical appliance in Europe or in Asia which are usually on 240V (or vice versa). It is slightly heavy but I guess you can't make it any lighter because of the transformer.

One thing to remember is that the voltage selector switch displays the INPUT voltage and NOT the output voltage.

So you would set the switch to 110V if your power supply is 110V and NOT if you want to connect an appliance that runs on 110V. Setting the switch to 110V will give you 240V at the converter output. Be very careful with this or you might end up frying your appliance and/or burning out the fuse in your electrical supply.

You set the switch to 240V if your INPUT voltage is 240V and not if you want to run an appliance that works on 240V. Setting the switch to 240V will give you 110V at the converter output. This combination is not as dangerous because an appliance that expects 240V just wouldn't work if you connected it to a supply with a lower voltage.

Finally, be careful NOT to connect any appliance that requires more than 60-70W of power or you run the risk of burning out the transformer inside the converter.

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I recieved this item very quickly but when i plugged it in, it would not take 110v up to 220v as advertised and after about ten minutes it just stopped working all together. BIG WASTE OF MONEY!

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Dreadful. Worked for about 2 minutes and then died. I was careful to check capacity (watts, hertz, etc) beforehand so it's not like I overloaded it. Had to buy a more expensive one, which is what I should have done in the first place! Perhaps in the world of voltage converters, you get what you pay for?