0

I found on Amazon a device like this https://m.media-amazon.com/images/I/61zYa3ECQqL.SS350_AC.jpg that can convert from a 12V power supply of a car to 220V to connect a laptop charger onto the socket of this adapter. But how can a device convert something with only 12V in input and so output a 220V tension ? How can it be possible ?