I just took my system to radio shack and said " I need a power cord for this". To which the person responded...what the hell is that?...lol.
I did that only I walked in with my duo-r and when they started with their expertise I said gtfo, I got this.
Dude told me all Japanese consoles require a step-up for US.
and then told me that you need step down for UK in the US, since I asked about a step up for an MSX while I was there.
Yeah, I step down to 220v, totally.
herp^derp.