As any hardcore videogame and computer collector knows, there are many intriguing classic systems out there worthy of your time that never made it to your home territory. One of the biggest challenges when importing vintage systems from foreign countries is having the necessary hardware on hand to convert either or both of the power (voltage) and video (television standard) connections.
With vintage Japanese systems in the US, it's fairly trivial to use those systems here. Generally speaking, the video signal is the same - though you may have to tune in a weird channel if you're stuck using an RF connection - and power requirements are similar, generally 100-110v to our 110-120v. While you can usually get away with just plugging a Japanese system direct into a US outlet, a simple power converter is still recommended in some situations. With vintage European systems, it's not nearly as straightforward, since they use a completely different television standard and power requirements usually run 220-240v, so you need to do double conversions. On top of that, plugs for both video and power are often unusual shapes and may require yet another adapter.