All my electronics are dual voltage so I only needed converters with euro plugs for a family trip to the Netherlands. The bulkiness and weight of transformers are eliminated when the chargers already operate at 100 to 240 volts. They've easily charged two laptops, two tablets, three phones, and a digital camera. Both sides fit perfectly into the corresponding jack/plug. They were light and well made. I'd love to say I'd buy them again, but I can't imagine it's necessary; They will last a lifetime. Remember that you are only buying something that will allow you to fit an American plug into a round European socket. It doesn't do anything for voltage, frequency, etc. Check the fine print on your chargers to make sure they're rated for 240V 50Hz operation. if yes you can go
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