I think it's a pretty bad sign if the manufacturer presents just a bunch of photos but no straight facts about the hardware, video signals, connections, etc.
And I don't get it why the case has to be made out of aluminium. I'd prefer my old grey plastic frontloader NES anytime over that hipster-styled overpriced ...thing.
No need for Dual Mono if somebody just can buy or build a cheap Mono audio adaptor. And I don't think the fake stereo produced by tapping into the NES' guts sounds that good.
Does that thing uses at least the recently releases RGB upgrade board from
etim?