The Atari 7800+ is a trip down the retro rabbit hole

Wirelessly connects to your new 7800+ and 2600+ AND it works with original 2600 and 7800 hardware using the included DB9 wireless adapter.

That’s the important bit right there. New wireless CX78s sold separately for $35? Assuming the build quality is the same as the prior wired repro ones they were selling they can shut up and take my money.