Mine arrived the other day.
It came with a North American standard power cord, but I noted that the casing under the plug socket showed the 220V marking.
Opened up the unit and sure enough it was set for 220V operation. No biggie, I just flipped the switch to 115V and all is good.
While I had the casing open, I also swapped out the fuse for an audio grade Furutech part and also added some Stillpoints ERS fabric to various points of the interior.
The U12 sounds great, although still requires more break-in time. I remember my Gustard U10 took about a week before it started sounding it's best.
They sound similar, but perhaps the U12 sounds a touch warmer (more romantic) compared to the U10.
Either way, the "value for money" is stupidly high on these things!